if 3 men or 4 women can reap a field in 10 days how long will 5 men and 6 women take to reap it ?
explanation : 3 men reap 1 / 10 field in 1 day 1 man reap 1 / ( 3 x 10 ) 4 women reap 1 / 10 field in 1 day 1 woman reap 1 / ( 10 x 4 ) 5 men and 6 women reap ( 5 / ( 3 x 10 ) + 6 / ( 4 x 10 ) ) = 19 / 60 in 1 day 5 men and 6 women will reap the field in 19 / 60 days answer : option a
divide(10, add(multiply(5, divide(10, 3)), multiply(6, divide(10, 4))))