Question

A river 3 metres Deep and 45m wide is flowing at the rate of 3 km per hour find the amount of water that runs into the sea for minutes

Answer 1

Area of cross section of river= 3 x 45 = 135 m^2
3km/h = (3000/60) meter/minute = 50m/min
so, water flowing into the sea= area of cross section x rate of flowing water
= 135 x 50
= 6750 m^3
there water flowing per minute= 6750 m^3