1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

# A cistern has two pipes which fill it in 12 mins and 15 mins each. There is a third outlet pipe in the cistern. When all three pipes are working, the cistern fills up in 20 mins. How much time will it take for the cistern to get empty?

A

20 mins

No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
B

30 mins

No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
C

40 mins

No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
D

50 mins

No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
E

10 mins

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

## The correct option is E 10 mins Work done by the outlet pipe in 1 min = 120−112−115=−110 So the outlet pipe will empty the cistern in 10 mins.

Suggest Corrections
0
Join BYJU'S Learning Program
Related Videos
Relation Between Depth and Pressure
PHYSICS
Watch in App
Join BYJU'S Learning Program