If 15 men 4 hours per day works for 14 days get Rs.35/- then how many men required if the work is 8 hours per day for 10 days they get 50/- ?

We know  $\frac{M1\times D1\times H1}{W1} = \frac{M2\times D2\times H2}{W2}$ 

=>  $\frac{15\times 4\times 14}{35} = \frac{M\times 8\times 10}{50}$

=> M = 15