A river 2 m deep and 45 m wide is flowing at the rate of 3 km/h. Find

1.	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.
Answer» It is given in the question that, Area of cross section of river = 45m × 2m = 90 m² Rate of flow = 3 km/hr = \(\frac{3\times(1000\,m)}{(60\,m)}\) = 50 m/min Therefore, Volume of water flowing through the cross-section in one minute = 90 m² × 50 m/min = 4500 m³ per minute

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.

Answer»

It is given in the question that,

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

Rate of flow = 3 km/hr

= \(\frac{3\times(1000\,m)}{(60\,m)}\)

= 50 m/min

Therefore,

Volume of water flowing through the cross-section in one minute = 90 m² × 50 m/min

= 4500 m³ per minute