Three pipe E F and R can fill a tank If Pipe R alone can fill a tank in 24 minutes then the pipe R i...........

Quantitative Aptitude ( CCS) Bar Graph

Time taken by the pipes to fill a tank/cistern (hours/minutes)

Three pipe E, F, and R can fill a tank. If Pipe R alone can fill a tank in 24 minutes then the pipe R is closed 12 minutes before the tank is filled. In what time the tank is full?

8 (5/13)

8 (4/13)

7 (4/13)

8 (6/13)

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Explanation:

Explanation :
Let T is the time taken by the pipes to fill the tank
(1/12 + 1/18 + 1/24)*(T – 12) + (1/12 + 1/18)*12 = 1
We will get T = 108/13 = 8 (4/13)