Question

If $19$ water tanks can be filled by a pipe in $9\frac{1}{2}$ hrs,then how much time will be taken by the pipe to fill $59$ such water tanks?

Answer 1

$\begin{array}{c}Timetakentofill19watertanks=9\frac{1}{2}h=\frac{19}{2}\\ \therefore Timetakentofill1water\tan ks=\frac{19}{2}÷19\\ \therefore Timetakentofill59suchwatertanks=\frac{19}{2}\times \frac{1}{19}\times 59\\ =\frac{59}{2}h\\ =29\frac{1}{2}hours\end{array}$

Hence, this is the answer.