1.

A tanker can fill a cistern in 12 hours. After half the cistern is filled, 2 more similar tankers are opened. What is the time taken to fill the remaining half of the tank?

A. 3 h
B. 1 h 30 min
C. 2 h
D. 1 h 45 min
Answer» D. 1 h 45 min


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