Question

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

Answer 1

Given:

Ratio of flow of water $=2km/hour$ $=\left(\frac{2000}{60}\right)$ m/min

$\Rightarrow$$h=3$m

$\Rightarrow$$b=40$m

$\Rightarrow$Volume of water flowed in $1$ min $=\frac{2000}{60}\times 40\times 3$
$=4000$m${}^3$