Question

Andrew can complete a job by himself in 20 minutes. if aijalon helps him, they can complete the job in 12 minutes. how long would it take aijalon to complete the job by himself? (in minutes.) rate of work problem

Answer 1

Answer:

30 min

Step-by-step explanation:

1 /  ( 1/20 + 1/ x) =  12

1 = 12/20 + 12/x

8/20 = 12/x

x = 12 * 20 / 8 = 30 min