if 3 men or 4 women can reap a field in 43 days how long will 7 men and 5 women take to reap it ?
"explanation : 3 men reap 1 / 43 field in 1 day 1 man reap 1 / ( 3 x 43 ) 4 women reap 1 / 43 field in 1 day 1 woman reap 1 / ( 43 x 4 ) 7 men and 5 women reap ( 7 / ( 3 x 43 ) + 5 / ( 4 x 43 ) ) = 1 / 12 in 1 day 7 men and 5 women will reap the field in 12 days answer : option b"
divide(43, add(multiply(7, divide(43, 3)), multiply(5, divide(43, 4))))