Question

$15$ men buid a $16.25-m$ long wall up to a certain height in one day. How many men should be employed to build a wall of the same height but of length $26$ metres in one day?

Answer 1

given $15$ men can build a $16.25m$ wall in one day

$\Rightarrow$1 men can build $\frac{16.25}{15}=\frac{13}{12}m$ length of wall in one day

let the number of men required be x

$\Rightarrow x\times \frac{13}{12}m=26m$

$\Rightarrow x=\frac{26\times 12}{13}=24$

therefore 24 men are required