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Water is being pumped out through a circular pipe whose internal diameter is 7cm. If the flow of water is 12 cm per second, how many litres of water is being pumped out in one hour ?
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- 1663.2
- 1500
- 1747.6
- 2000
- 1663.2
Correct Option: A
Volume of water flowing per second = πr²h
| = | × | × | × 12 = 462 cm³ | |||
| 7 | 2 | 2 |
∴ Volume of water pumped out in 1 hour = 462 × 60 × 60 cm³
= 1663200 cm³ = 1663.2 litres
