75 boys can complete a job in 24 days . how many men need to complete the job twice in 20 days
one man can complete the job in 24 * 75 = 1800 days to complete the job twice he would need 3600 days . thus , to complete the job in 20 days , 3600 / 20 = 180 men are needed . answer : c
divide(multiply(multiply(24, const_2), 75), 20)