Granddad

Grandfather have three barrels each with a capacity 2HL in the garden. How many times he can fill 10L can if two barrels are full and the third is filled with water to the half? How long it lasts water when irrigate the garden 125 liters a day?

Correct result:

a =  50
b =  4

Solution:

$$\begin{gathered} V=(2+1\mathrm{/}2)\cdot 200=500 \\ a=V\mathrm{/}10=500\mathrm{/}10=50 \end{gathered}$$

$b=V\mathrm{/}125=500\mathrm{/}125=4$

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