Question

A river $3m$ deep and $40m$ wide if flowing at the rate of $2$ km per hr. How much water will fall into the sea in a minute ?

Answer 1

Volume of water that falls into sea $=$ depth $\times$ width $\times$ flow water

$=3m\times 40m\times \frac{2km}{hr}$

$=4\times \frac{1000}{60}\frac{m^3}{min}$

$=4000\frac{m^3}{min}$

$=4\times {10}^3\times {10}^3$ liters

$4\times {10}^6$ liters of water falls into sea par $mm$