Question

If $35$ men can reap a field in $18$ days, in how many days can $20$ men reap the same filed?

Answer 1

If more number of men work, less number of days required. Therefore it's inversely proportional.

Now, let us consider the number of days to be $x$, then

$\Rightarrow 35\times 8=20\times x$

$\Rightarrow x=\frac{35\times 8}{20}=14$

$\therefore 14$ days are required.