if 15 workers can build a wall in 48 hours , how many workers will be required to do the same work in 30 hours ?
let the number of workers employed to build the wall in 30 hours be y 48 * 15 = 30 * y ( 48 * 15 ) / 30 = y y = 24 answer : b
divide(multiply(15, 48), 30)