A river 2 m deep and 45 m wide is flowing at the rate of 3 km/h. Find the quantity of water that runs into the sea per minute.
It is given in the question that,
Area of cross section of river = 45m × 2m = 90 m2
Rate of flow = 3 km/hr
= 50 m/min
Therefore,
Volume of water flowing through the cross-section in one minute = 90 m2 × 50 m/min
= 4500 m3 per minute