Question

One pipe can fill a tank three times as fast as another pipe. If together the two pipes can fill the tank in 36 minutes, then the slower pipe alone will be able to fill the tank in:
A.81 min.
B.108 min.
C.144 min.
D.192 min.

Answer 1

let faster pipe can fill total tank in x/3 min

slower pipe can fill the tank in 1/x min

1/x + 3/x = 1/36

x= 4*36

144 min

so answer is :- 144 minutes
so correct answer is option :- C

Answer 2

☆Question ☆

One pipe can fill a tank three times as fast as another pipe. If together the two pipes can fill the tank in 36 minutes, then the slower pipe alone will be able to fill the tank in:

A.81 min.

B.108 min.

C.144 min.

D.192 min.

☆Answer☆

In the attachment..