Question

A river $2m$ deep and $40m$ wide is flowing at the rate of $4.5kmperhour$.How many cubic meters of water runs into the sea per minute?

Answer 1

Dimensions of river:

Depth: $2m$, width$=40$m

Rate of flow$=4.5$ kph

$\Rightarrow$ No. of cubic metres of water in $1$ hour

$=2\times 40\times 4500$

$\therefore$ No. of cubic metres of water in $1$ minute

$=\frac{2\times 40\times 4500}{60}$

$=6000$.