A river 2 m deep and 45 m wide is flowing at the rate of 3 km per hour. Find the volume of water that runs into the sea per minute.
Given,
Depth of river (h) = 2 m
Breadth of river (b) = 45 m
Rate of flowing = 3 km/h
∴ Length = 
meter/min.
Volume of water = l × b × h = 
× 2 × 45 = 90 × 50 = 4500 m3
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