Question

If $36$ men can build a wall of $140m$ long in $21days$, how many men are required to build a similar wall of length $50m$ in $18days$?

Answer 1

$Wall$ Built by $Each$ $men$ $per$ $Day$ can be calculated as

$\Rightarrow \frac{140}{36\times 21}=.185$

Similarly,

$\Rightarrow 0.185=\frac{50}{men\times 18}$

$\Rightarrow men=15$