2020 · Q22
A river 3 m deep and 40 m wide is flowing at the rate of 2 km/hr and falls into the sea. What is the amount of water in litres that will fall into the sea from this river in a minute?
Elementary MathematicsTime, Speed and Distance
- A40,00,000 litres
- B4,00,000 litres
- C40,000 litres
- D4000 litres
Explanation
Discharge per minute = 3*40*(2000/60) = 4000 cubic metres = 40,00,000 litres. Hence option (A). Since one cubic metre is 1000 litres, 4000 m^3 per minute equals 40,00,000 litres.