Question
Quantitative Aptitude Question on Time and Work
Four pipes A, B,C and D can fill a cistern in 20, 25, 40 and 50 hours respectively. If A and B are opened as inle as outlet pipes from the cistern and all the four pipes are opened simultaneously, how many hours will take to fill the cistern c
A
20 hrs
B
11 1/9 hrs
C
22 2/9 hrs
D
45 hrs
Answer
22 2/9 hrs
Explanation
Solution
The correct option is (C):22 2/9 hrs