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A tank can be filled by a tap 20 min & by another 25 min. Both taps are kept open for 5 min & then second is turned off.

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

posted Aug 12, 2015 by Nikhil Pandey

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