if 20 men can build a wall 112 metres long in 6 days , what length of a similar wall can be built by 15 men in 3 days ?
"20 men is 6 days can build 112 metres 15 men in 3 days can build = 112 * ( 15 / 20 ) x ( 3 / 6 ) = 42 meters answer : e ."
multiply(112, divide(multiply(15, 3), multiply(20, 6)))