Rainfall

A rectangular garden of 25m in length and width 20m in width fall 4mm of water. Express by a fraction in basic form what part of the 60-hectolitre tank we would fill with this water.

Correct result:

f =  0.3333

Solution:

$$\begin{gathered} a=25\text{ m } \\ b=20\text{ m } \\ h=4\text{ mm } \\ {V}_1=a\cdot b\cdot h=25\cdot 20\cdot 4=2000\text{ l } \\ {V}_2=60\cdot 100=6000\text{ l } \\ f=V_1\mathrm{/}{V}_2=2000\mathrm{/}6000={\displaystyle \frac{1}{3}}=0.3333 \end{gathered}$$

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