Question

3. If 3 boys can do a piece of work in 2 days then 1 boy can do it in
days.

Answer 1

$no.ofboys = 3 \\ no.of \: days = 2 \\ no.of \: boys = 1 \\ no.ofdays = x \\ \frac{3}{1} = \frac{2}{x } \\ 3 = \frac{2}{x} \times 1 \\ x = 2 \times 3 \\ x = 6$

so 1 boy can do a piece of work in 6 days