Two taps X and Y can fill a tank in 10 hrs. and 15 hrs.respectively. If the both taps are opened together, the tank will be full in_________?

Two taps X and Y can fill a tank in 10 hrs. and 15 hrs.respectively.

1.	Two taps X and Y can fill a tank in 10 hrs. and 15 hrs.respectively. If the both taps are opened together, the tank will be full in_________?
A.	3 hrs.
B.	4 hrs,
C.	5 hrs.
D.	6 hrs.
Answer» E.

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Two taps X and Y can fill a tank in 10 hrs. and 15 hrs.respectively. If the both taps are opened together, the tank will be full in_________?

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