Assuming a world population of 8 billion and each standing person occupying about 0.25 m², total area is 8,000,000,000 × 0.25 = 2,000,000,000 m² = 2,000 km², roughly the area of a large city. Class 9 Ganita Manjari Part 2 book ...
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Base circumference 2πr = 35.2 m gives r = 5.6 m. Outer surface area is 2πr² = 197.12 m² = 1,971,200 cm². At ₹10 per 100 cm², the painting cost is 19,712 × 10 = ₹1,97,120. Class 9 Ganita Manjari part ...
At half depth, both height and radius of the water cone are half the cup’s dimensions. Since volume scales with the cube of dimensions, the water occupies (1/2)³ = 1/8 of the cup’s total volume. Cbse Class 9 Maths Ganita Manjari ...
Letting bat cost ₹x and ball ₹y gives 7x + 6y = 8880 and 3x + 5y = 4000. Multiplying and eliminating yields 17x = 20400, so x = 1200 and y = 80. A bat costs ₹1200, a ball ...
The shaded fraction is 1/5. The parallel lines connecting vertices and opposite midpoints are perpendicular, dividing the square into five congruent smaller squares by geometric dissection, making the central shaded square exactly one-fifth of the total area. Class 9 Maths Ganita ...