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QA - Placement Quizzes | Pipes and Cisterns | Question 7
Three pipes A, B and C were opened to fill a tank. Working alone, A, B and C require 10, 15 and 20 hours respectively. A was opened at 7 AM, B at 8 AM and C at 9 AM. At what time the tank would be completely filled, given that pipe C can only work for 3 hours at a stretch, and needs 1 hour standing time to work again.
(A)
12 : 00 PM
(B)
12 : 30 PM
(C)
1 : 30 PM
(D)
1 : 00 PM
Answer
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