Water flows through a pipe of internal diameter 7 cm at a speed of 4 metres per second into an empty tank. How many litres of water enter the tank in half an hour? Take π = 22/7.

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Accepted Answer

27720. Cross-section area = (22/7) × 3.5² = 38.5 cm². In one second the water advances 400 cm, so the volume delivered = 38.5 × 400 = 15400 cm³ = 15.4 litres. In half an hour (1800 seconds) the tank receives 15.4 × 1800 = 27720 litres.

Water flows through a pipe of internal diameter 7 cm at a speed of 4 metres per second into an empty tank. How many litres of water enter the tank in half an hour? Take π = 22/7.

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