RRB Group D 10-Dec-2018 Shift 1 Solved Paper

Question : 39 of 100

Marks: +1, -0

A tank can be filled by tap A in 3 hrs and B can fill the same in 4 hrs. Tap C empty the filled tank in 6 hrs. If all the three taps are opened simultaneously, how much time will be taken to fill the tank completely?

8 hrs.
5 hrs.
12/5 hrs.
10/7 hrs.

Validate

Solution:

Together they can fill in
=

{12}/{(4+3-2)}={12}/5 \hrs

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