Question

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

Answer 1

given,

length=2 km/h=2000/60= 100/3m

breadth=40m

height=3m

volume=lbh

=100/3×40×3

=4000m³

•1m³=1000ltr.

no. of litres=4000×1000

=4000000ltr.

Answer 2

$\huge{\gray{\boxed{\boxed{\pink{\ulcorner{\mid{\overline{\underline{\bf{Answer:-}}}}}}\mid}}}}$

The river is 3m deep, 40m wide and is flowing at the rate of 2km\hour.

$\sf\red{The \: length \: of \: water \: flow \: in \: 1min= \frac{2000}{60} }$

$\sf\pink{ = \frac{100}{3}m }$

$\sf\gray{Therefore, here \: l = \frac{100}{3}m,b =40m \: and \: h = 3m }$

$\sf\pink{Thus \: required \: volume \: of \: water= \: \frac{100}{3} \times 40 \times 3 }$

$\sf\gray{ = 4000 {m}^{3} }$