Question

12 men or 15 woman can complete a work in 21 days.In how many days will 6 men and 10 women together complete the same work

Answer 1

It is a question of compound variation .

12 men and 15 women finish the work =21 days

so, 1 man and 15 women finish the work=21×12 days

so,1 man and 1 woman finish the work=21×12×15 days

so, 6 men and 1 woman finish the work=21×12×15/6

so, 6 men and 10 women finish the work= 21×12×15/6×10

=63 days