The required rise in the water level is h = 20 cm − 16 cm = 4 cm. The cylindrical volume corresponding to this rise is V = πr²h = π × 4² × 4 = 64π cm³. Each marble is a sphere of radius 1 cm, with volume v = (4/3)π(1)³ = (4/3)π cm³. Dividing the required volume by one marble's volume gives 64π / [(4Read more
The required rise in the water level is h = 20 cm − 16 cm = 4 cm. The cylindrical volume corresponding to this rise is V = πr²h = π × 4² × 4 = 64π cm³. Each marble is a sphere of radius 1 cm, with volume v = (4/3)π(1)³ = (4/3)π cm³. Dividing the required volume by one marble’s volume gives 64π / [(4/3)π] = 64 × (3/4) = 48 marbles.
For more NCERT Solutions of Class 9 Maths Ganita Manjari Part 2 Chapter 14 Math of Space: Surface Area and Volume Question Answer (2026-27)
Indigenous and forest-dwelling communities protect forest biodiversity through time-tested traditional knowledge and ecological ethics. They designate virgin forest tracts as sacred groves (sarnas or devarakadus), completely barring logging and hunting. By practicing rotational foraging, protectingRead more
Indigenous and forest-dwelling communities protect forest biodiversity through time-tested traditional knowledge and ecological ethics. They designate virgin forest tracts as sacred groves (sarnas or devarakadus), completely barring logging and hunting. By practicing rotational foraging, protecting keystone species like Mahua and Peepal, guarding boundaries against illegal loggers and clearing dry leaf litter, they maintain soil health, protect wildlife habitats and prevent large-scale wildfire outbreaks.
For more NCERT Solutions of Class 9 Social Science Part 2 Chapter 2 Life on Earth Question Answer (2026-27)
A forest fire is an uncontrolled blaze spreading through forests, brushland or grasslands, fueled by dry combustible biomass, wind and heat. Below is an operational plan for prevention and mitigation: Prevention Plan (Before Outbreak) Maintain cleared fire lines to physically separate forest blocksRead more
A forest fire is an uncontrolled blaze spreading through forests, brushland or grasslands, fueled by dry combustible biomass, wind and heat. Below is an operational plan for prevention and mitigation:
Prevention Plan (Before Outbreak)
Maintain cleared fire lines to physically separate forest blocks and stop advancing flames.
Conduct controlled early burning of dry leaf litter and undergrowth before peak summer.
Impose strict bans on unextinguished campfires, discarded matches and unchecked agricultural residue burning near forest borders.
Train Joint Forest Management (JFM) village committees and run awareness campaigns.
Mitigation Plan (During & After Outbreak)
Track real-time thermal anomalies using satellite systems (such as FSI-MODIS/SNPP-VIIRS) and forest watchtowers for immediate alerting.
Deploy rapid response strike teams equipped with pressurized backpack sprayers, beaters and spark arrestors.
Construct temporary counter-fires and douse hotspots to prevent fire reignition.
Replant native fire-hardy flora and restore affected topsoil and watershed zones.
For more NCERT Solutions of Class 9 Social Science Part 2 Chapter 2 Life on Earth Question Answer (2026-27)
Rulers safeguarded sovereignty by alternating between direct military confrontation and diplomatic accommodation. While leaders like Maharana Pratap deployed guerrilla tactics across rough hills to resist imperial subjugation, others formed strategic confederacies and diplomatic treaties. Rulers forRead more
Rulers safeguarded sovereignty by alternating between direct military confrontation and diplomatic accommodation. While leaders like Maharana Pratap deployed guerrilla tactics across rough hills to resist imperial subjugation, others formed strategic confederacies and diplomatic treaties. Rulers forged regional matrimonial alliances, entered negotiated peace pacts to avoid destructive pillaging and pooled military forces with neighboring chieftains to counter dominant empires, thereby preserving administrative independence and cultural continuity.
For more NCERT Solutions of Class 9 Social Science Part 2 Chapter 3 Resistance and Resilience (1000–1700 CE) Question Answer (2026-27)
Multiple structural factors fueled resilience across Indian communities. Natural topographic defenses—such as the Western Ghats, Aravalli ranges and dense riverine forests—disrupted enemy supply lines. Resilient village economies, self-regulating guilds and agricultural stability preserved socioeconRead more
Multiple structural factors fueled resilience across Indian communities. Natural topographic defenses—such as the Western Ghats, Aravalli ranges and dense riverine forests—disrupted enemy supply lines. Resilient village economies, self-regulating guilds and agricultural stability preserved socioeconomic foundations despite imperial shifts. Furthermore, deep community solidarity, fierce loyalty to local dynasties and mobile hit-and-run military tactics allowed states to regroup, rebuild and sustain protracted struggles across centuries.
For more NCERT Solutions of Class 9 Social Science Part 2 Chapter 3 Resistance and Resilience (1000–1700 CE) Question Answer (2026-27)
A cylindrical glass of height 25 cm and radius 4 cm has water up to a height of 16 cm. A crow wants to drink water from this glass. The water must be at a height of 20 cm for the crow to reach it. There are some marbles lying around. How many marbles of radius 1 cm should the crow drop into the glass to make the water reach the required height?
The required rise in the water level is h = 20 cm − 16 cm = 4 cm. The cylindrical volume corresponding to this rise is V = πr²h = π × 4² × 4 = 64π cm³. Each marble is a sphere of radius 1 cm, with volume v = (4/3)π(1)³ = (4/3)π cm³. Dividing the required volume by one marble's volume gives 64π / [(4Read more
The required rise in the water level is h = 20 cm − 16 cm = 4 cm. The cylindrical volume corresponding to this rise is V = πr²h = π × 4² × 4 = 64π cm³. Each marble is a sphere of radius 1 cm, with volume v = (4/3)π(1)³ = (4/3)π cm³. Dividing the required volume by one marble’s volume gives 64π / [(4/3)π] = 64 × (3/4) = 48 marbles.
For more NCERT Solutions of Class 9 Maths Ganita Manjari Part 2 Chapter 14 Math of Space: Surface Area and Volume Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/maths/ganita-manjari-chapter-14/
See lessHow do forest dwellers contribute to the protection and conservation of forests?
Indigenous and forest-dwelling communities protect forest biodiversity through time-tested traditional knowledge and ecological ethics. They designate virgin forest tracts as sacred groves (sarnas or devarakadus), completely barring logging and hunting. By practicing rotational foraging, protectingRead more
Indigenous and forest-dwelling communities protect forest biodiversity through time-tested traditional knowledge and ecological ethics. They designate virgin forest tracts as sacred groves (sarnas or devarakadus), completely barring logging and hunting. By practicing rotational foraging, protecting keystone species like Mahua and Peepal, guarding boundaries against illegal loggers and clearing dry leaf litter, they maintain soil health, protect wildlife habitats and prevent large-scale wildfire outbreaks.
For more NCERT Solutions of Class 9 Social Science Part 2 Chapter 2 Life on Earth Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/social-science/part-2-chapter-2/
See lessWhat is a forest fire? Prepare a plan for prevention and mitigation of forest fires.
A forest fire is an uncontrolled blaze spreading through forests, brushland or grasslands, fueled by dry combustible biomass, wind and heat. Below is an operational plan for prevention and mitigation: Prevention Plan (Before Outbreak) Maintain cleared fire lines to physically separate forest blocksRead more
A forest fire is an uncontrolled blaze spreading through forests, brushland or grasslands, fueled by dry combustible biomass, wind and heat. Below is an operational plan for prevention and mitigation:
Prevention Plan (Before Outbreak)
Mitigation Plan (During & After Outbreak)
For more NCERT Solutions of Class 9 Social Science Part 2 Chapter 2 Life on Earth Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/social-science/part-2-chapter-2/
See lessHow did Indian rulers use resistance and alliances to safeguard their lands?
Rulers safeguarded sovereignty by alternating between direct military confrontation and diplomatic accommodation. While leaders like Maharana Pratap deployed guerrilla tactics across rough hills to resist imperial subjugation, others formed strategic confederacies and diplomatic treaties. Rulers forRead more
Rulers safeguarded sovereignty by alternating between direct military confrontation and diplomatic accommodation. While leaders like Maharana Pratap deployed guerrilla tactics across rough hills to resist imperial subjugation, others formed strategic confederacies and diplomatic treaties. Rulers forged regional matrimonial alliances, entered negotiated peace pacts to avoid destructive pillaging and pooled military forces with neighboring chieftains to counter dominant empires, thereby preserving administrative independence and cultural continuity.
For more NCERT Solutions of Class 9 Social Science Part 2 Chapter 3 Resistance and Resilience (1000–1700 CE) Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/social-science/part-2-chapter-3/
See lessWhat factors contributed to the resilience of different kingdoms and communities during this period?
Multiple structural factors fueled resilience across Indian communities. Natural topographic defenses—such as the Western Ghats, Aravalli ranges and dense riverine forests—disrupted enemy supply lines. Resilient village economies, self-regulating guilds and agricultural stability preserved socioeconRead more
Multiple structural factors fueled resilience across Indian communities. Natural topographic defenses—such as the Western Ghats, Aravalli ranges and dense riverine forests—disrupted enemy supply lines. Resilient village economies, self-regulating guilds and agricultural stability preserved socioeconomic foundations despite imperial shifts. Furthermore, deep community solidarity, fierce loyalty to local dynasties and mobile hit-and-run military tactics allowed states to regroup, rebuild and sustain protracted struggles across centuries.
For more NCERT Solutions of Class 9 Social Science Part 2 Chapter 3 Resistance and Resilience (1000–1700 CE) Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/social-science/part-2-chapter-3/
See less