SOLUTION: Mark takes 2 hours to clean 500 bottles,Flor takes 3 hours to clean 450 bottles.Working together,how long should it take them to clean 1,500 bottles?

Question 1040732: Mark takes 2 hours to clean 500 bottles,Flor takes 3 hours to clean 450 bottles.Working together,how long should it take them to clean 1,500 bottles?
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
Mark's rate is 500/2 = 250 bottles per hour.
Flor's rate is 450/3 = 150 bottles per hour.
Let x = number of hours it would take them to clean working together.
==> (250+150)x = 1500
==> 400x = 1500 ==> x = 3.75 hours, or 3 hours and 45 minutes.
RELATED QUESTIONS
If it takes me 3 hours to clean the entire house and it would take you 2 hours to clean... (answered by ikleyn,josgarithmetic)

roger cleans the yard in 2 hours. emily takes 4 hours to clean the same yard. how long... (answered by solver91311)

It takes Mary 4 hours to clean the house. John can clean the house in 6 hours. Working... (answered by checkley77)

it takes bob 10 hours to clean. it takes bill 7 hours to clean. How long does it take if... (answered by ewatrrr)

craig and jim,working together, can clean the house in 2 hours. Working alone, jim takes... (answered by nerdybill,stanbon)

Working together, Sarah and Heidi can clean the garage in 6 hours. If they work alone, it (answered by richwmiller)

Working together, Sarah and Heidi can clean the garage in 6 hours. If they work alone, it (answered by josmiceli)

If your friend take 5 hours longer to clean a house and together it takes 6 hours. How... (answered by ankor@dixie-net.com)

It takes 6 days to clean a house working 4 hours per day. How many days will it take to... (answered by Fombitz)