Q: Pipes A, B and C can fill a tank in 15, 30 and 40 hours, respectively. Pipes A, B and C are opened at 6 a.m., 8 a.m. and 10 a.m., respectively, on the same day. When will the tank be full?
A.
7:20 p.m.
B.
3:20 p.m.
C.
5:20 p.m.
D.
11:20 p.m.
Correct Answer:
Option B -
Explanations:
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