Two pipes P and Q can fill a tank in 20hrs and 25hrs respectively while a third pipe R can empty the...........

Quantitative Aptitude ( CCS) Pipes&cistern

Two pipes P and Q can fill a tank in 20hrs and 25hrs respectively while a third pipe R can empty the tank in 30hrs. If all the pipes are opened together for 10hrs and then pipe R is closed then in what time the tank can be filled.

400/23hrs

400/27hrs

200/23hrs

200/27hrs

छोटे Courses बड़े Results

Master Pipes&cistern

Prepare through Micro-courses

Try Now

Explanation:

Answer & Explanation
Answer – b) 400/27hrs
Explanation :
(1/20 + 1/25 – 1/30)*10 + (1/20 + 1/25)*x = 1
We get x = 130/27, so total time to fill the tank = 130/27 + 10 = 400/27 hrs