A tank is connected with four pipes A, B, C and D of which
two are filling the tank and other two are emptying it. The
time taken by A, B, C and D to finish their jobs are 10 hours
15 hours, 20 hours and 30 hours respectively. All four pipes
are opened. When the tank was empoy, it took 12 hours to f
it completely. Which two are the outer pipes?
(a) A and B
(b) C and D
(c) A and C
(d) B and D
Answers
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Answer:
l think it is (C) A and C
it will help you
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