Question

A river 2.5m deep and 50m wide is flowing at the rate of 2km per hour. How much water will fall into the sea in a minute

Answer 1

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Answer 2

the cross sectional area of the river is 2.5 * 50 = 125 m2
flow rate = 2km/h
               = 2000/60 m/min
               = 33.33....... m/min
so volume = flow rate * area
                 = 4166.67 m3 or 4166.67 kilolitre