A river 3 m deep and 40 m wide is flowing at the rate of 2 km per hour. How much water will fall into the sea ina minute?
Given,
Depth of river = 3m
Width of river = 40 m
Rate of flow of river = 20km/h
Length of river = distance travelled by water in 1 minute at speed 2km/h
=
So, volume of water = 
8