Question

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

Answer 1

2 km/hr means 2000 m in one hour
that is 2000/60 in one minute
Water falling into sea in one minute is 2.5*50*2000/60
= 25*5*200/6
25*5*100/3 = 12500/3 = 41066.66 cubic metre of water 

Answer 2

Answer:

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A river 3 m deep and 40 m wide is flowing at the rate of 2 km per hour. How much water will fall into the sea in a minute?

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Please refer to above attachment.!!!