Question 279511
John can clean the pool in 30 minutes, Julie can clean the pool in 45 minutes and Tom can clean the pool in 90 minutes. How long would it take to clean the pool if all 3 work together

John does 2 jobs in 1 hour

jule does 4/3 job in 1 hour

Tom does 2/3 job in 1 hour


All theree will do 2+4/3 +2/3 of the job in 1 hour

4 jobs in 1 hour

for 1 job they will tale 1/4 hr or 15 minutes