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?

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) (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) (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

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