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2 cm of rain has fallen on a square km of land. Assuming that 50% of the raindrops could have been collected and contained in a pool having a 100 m × 10 m base, by what level would the water level in the pool have increased ?
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- 1 km
- 10 m
- 10 cm
- 1 m
- 1 km
Correct Option: B
Volume of rain water = Area of base × height
| = 1000000 × | = 20000 cu. metre | |
| 100 |
Water stored in pool = 10000 cu. metre
| ∴ Required water level = | = 10 metre | |
| 100 |
