(i) A dough ball of radius 6 cm yields (6/1.5)³ = 64 small dough balls of radius 1.5 cm, producing about 64 chapatis. (ii) Edible volume is the hemispherical shell volume: (2/3)π(R³ − r³) using outer and inner radii. Class 9 ...
Discussion Forum Latest Questions
(i) Option (c): New volume (l + 1)wh minus original lwh gives wh cubic units. (ii) Option (e): π(r + 1)²h − πr²h = 2πrh + πh cubic units. (iii) Volume decreases by (4/3)π(3r² − 3r + 1) cubic units. Ganita Manjari Part ...
Let the father’s age be F, which equals children’s sum S. In 20 years, children gain 4 × 20 = 80 years: F + 80 = 2(F + 20). This gives F + 80 = 2F + 40, so F ...
Robot 1 follows the line y = (4/3)x, while Robot 2 follows y = 2(x − 10). Equating them gives 2x − 20 = (4/3)x, which solves to x = 30 and y = 40. Their paths intersect at (30, ...
Exactly one unique line exists. A specified slope m and a fixed point (x₁, y₁) uniquely determine the line using the point-slope relation y − y₁ = m(x − x₁). Ganita Manjari Part 2 Class 9 Maths chapter 13 question answer Class ...