2016 · Q57
Rain water from a roof 22 m x 20 m drains into a cylindrical vessel having diameter of base 2 m and height 3.5 m. If the vessel is just full, what is the rainfall ?
Elementary MathematicsMensuration
- A3.5 cm
- B3 cm
- C2.5 cm
- D2 cm
Explanation
Vessel volume = π(1)²(3.5) = 11 m³ (with π = 22/7). Spread over the roof area 22×20 = 440 m², the rainfall depth is 11/440 = 0.025 m = 2.5 cm (option C).