Mensurationhard · Past Paper
The rain water from a roof of 22 m × 20 m drains into a cylindrical vessel having diameter of base 2 m and height 3.5 m. If the vessel is just full, find the rainfall in cm.
A2.5 cm
B5 cm
C1.25 cm
D10 cm
✓ Correct Answer: A — 2.5 cm
Vol_vessel = (22/7) * 1² * 3.5 = 11 m³. Vol_rain = 22 * 20 * h = 440h. 440h = 11 => h = 11/440 = 0.025 m = 2.5 cm.
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