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in Surface Areas And Volumes by (49.9k points)

A river 2m deep and 45m wide is flowing at the rate of 3km/h. Find the quantity of water that runs into the sea per minute.

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Given that rate of flow 3km/h

Area of cross section of river = 45 × 2 = 90 m2

Rate of flow 3km/h= 3 × 1000/60= 50m/min

Volume of water is flowing in cross section in 1 minute is= 90 × 50

= 4500 m3 per minute

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