Question

A river 2 metres deep and 45 metres wide is flowing at the rate of 3 km per hour. Find the amount of water that runs into sea per hour.

Answer 1

Assuming that the river is cuboidial

Height$=2m$

Breadth$=45m$

Length $=$distance covered in $1hour$ $=3km=3000m$

The water that runs into it per hour $=$ volume of cuboid

$=lbh$

$=2\times 45\times 3000$

$=270000m^3$