RRB NTPC Mains or Stage 2 Model Paper 9 with solutions

Question : 36 of 120

Marks: +1, -0

A tank is filled in 5 hours by three pipes A, B and C. The pipe C is twice as fast as B and B is twice as fast as A. How much time will pipe A alone take to fill the tank ?

20 hrs
25 hrs
35 hrs
Cannot be determind

Validate

Solution:

x/2

and

x/4

hours respectively to fill the tank.

∴1/x+ 2/x+ 4 /x=1/5⇒x= 35 hrs.

Go to Question:

Prev Question

Next Question