A river is 3m deep and 40m wide is flowing at the rate of 2km per hour. How much water will fall into the sea in a minute?
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Given, a river 3m deep and 40m wide is flowing at the rate of 2km per hour.Area of cross section of the river = 3 * 40 = 120 m2
Now, volume of water flowing through this cross section in every minute = Area * rate
= 120 * 2 km/hr
= 120 * (2000/60) m/min
= 2 * 2000
= 4000 m3
Since 1 m3 = 1000 litres
So, 4000 m3 = 4000 * 1000 litres = 4000000 litres
So, in 1 minute, water will fall into the sea is 4000000 litres.
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