

MCQOPTIONS
Saved Bookmarks
1. |
Q: Four pipes P, Q, R and S can fill a cistern in 25, 20, 50 and 40 hours respectively. The pipe Q was opened at 7 pm, P at 9 pm, S at 10 pm and R at 11 pm. When will the cistern be full? |
A. | 03:29:00 |
B. | 02:47:00 |
C. | 04:09:00 |
D. | 05:02:00 |
Answer» D. 05:02:00 | |