1.

Two faucet A and Bcan fill a cistern in 6 hours and 2 hours respectively. If they are opened on alternatehours and if faucet A is opened first, in how many hours will the cistern be full?

A. 4 hrs
B. 5 hrs
C. 6 hrs
D. 7 hrs
E.
Answer» B. 5 hrs


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