SOLUTION: one pipe can fill a bathtub in 6 minutes and a second pipe can fill it in 12 minutes.If the tub is empty how long will it take to fill the tub if both pipes were to fill it?

Algebra ->  Rate-of-work-word-problems -> SOLUTION: one pipe can fill a bathtub in 6 minutes and a second pipe can fill it in 12 minutes.If the tub is empty how long will it take to fill the tub if both pipes were to fill it?      Log On


   



Question 281487: one pipe can fill a bathtub in 6 minutes and a second pipe can fill it in 12 minutes.If the tub is empty how long will it take to fill the tub if both pipes were to fill it?
Found 2 solutions by solver91311, richwmiller:
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


If A can do a job in x time periods, then A can do of the job in 1 time period. Likewise, if B can do the same job in y time periods, then B can do of the job in 1 time period.

So, working together, they can do



of the job in 1 time period.

Therefore, they can do the whole job in:



time periods.


John


Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
an easier way to look at it is
1/6+1/12=1/x or
x/6+x/12=1
2x+x=12
3x=12
x=4
4 minutes for both to fill it
4/6+4/12=1
2/3+1/3=1
the first pipedoes 2/3 and the second pipe does 1/3