Question

In a shower, $5cm$ of rain falls. Find the volume of water that falls on $2$ hectares of ground.

Answer 1

Area of ground $=2$ hectares.

Now we know that, $1$ hectare $=10000m^2$ or ${10}^4{m}^2$

Therefore, area of ground $=2\times {10}^4{m}^2$

Now, we also know that $1cm=\frac{1}{100}m$

Therefore, the height of the rain fall $=\frac{5}{100}m$

Hence, Volume of water that falls on the ground $=$ Area of the ground $\times$ height of the rainfall

$=\frac{5}{100}\times 2\times {10}^4{m}^3$

$=10\times {10}^{-2}\times {10}^4$

$={10}^3{m}^3$