Question

A river 3m deeo and 40m wide is flowing at the rate of 2km/h. How much water will fail into the sea in a minute?

Answer 1

speed of water in km/min = 2÷60 = 0.03km/min
in one minute water flows 0.03km. Considering this as the length of cuboid formed by the river,
amount of water that will fall into the sea in a minute is = 3×40×0.03×1000 = 360m(cube) = 360000000 litres

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.

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

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

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

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

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