if 2 men or 3 women can reap a field in 12 days how long will 4 men and 5 women take to reap it ?
"explanation : 2 men reap 1 / 12 field in 1 day 1 man reap 1 / ( 2 x 12 ) 3 women reap 1 / 12 field in 1 day 1 woman reap 1 / ( 12 x 3 ) 4 men and 5 women reap ( 4 / ( 2 x 12 ) + 5 / ( 3 x 12 ) = 11 / 36 in 1 day 4 men and 5 women will reap the field in 11 / 36 days answer : option b"
divide(12, add(multiply(4, divide(12, 2)), multiply(5, divide(12, 3))))