1.

 A tank can be filled by one tap in 20 min. and by another in 25 min.Both the taps are kept open for 5 min. and then the second is turned off. In how many minutes more will the tank be completely fille

A. 11mints
B. 10mints
C. 20mints
D. 15mints
Answer» B. 10mints


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