If pipe A can fill the tank in 45 minutes and pipe B in 30 minutes, find the time to fill the tank if both the pipes are opened together.

If pipe A can fill the tank in 45 minutes and pipe B in 30 minutes, fi

1.	If pipe A can fill the tank in 45 minutes and pipe B in 30 minutes, find the time to fill the tank if both the pipes are opened together.
A.	12 minutes
B.	20 minutes
C.	18 minutes
D.	15 minutes
Answer» D. 15 minutes

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If pipe A can fill the tank in 45 minutes and pipe B in 30 minutes, find the time to fill the tank if both the pipes are opened together.

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