SOLUTION: If two people work at washing 5 cars and one can do all 5 cars on their own in 36 minutes and the other can do all 5 on their own in 42 minutes, how long does it take to wash all 5
Algebra ->
Test
-> SOLUTION: If two people work at washing 5 cars and one can do all 5 cars on their own in 36 minutes and the other can do all 5 on their own in 42 minutes, how long does it take to wash all 5
Log On
Question 1104644: If two people work at washing 5 cars and one can do all 5 cars on their own in 36 minutes and the other can do all 5 on their own in 42 minutes, how long does it take to wash all 5 working together? Found 2 solutions by jorel1380, josgarithmetic:Answer by jorel1380(3719) (Show Source):
You can put this solution on YOUR website! The first person does 5 cars in 36 minutes, or 5/36 car per minute. The second one does 5/42 car per minute. Together,:
5/36+5/42=5/n
35/252+30/252=5/n
35n+30n=1260
n=1260/65=252/13 min. working together
☺☺☺☺
(