if tap A can fill 2/5 of a tank in 12 hr and tap B can fill 1/6 of tank in 6 hrs then how long will it take to fill the tank if both taps are open?
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If tap A can fill 2/5 of a tank in 12 hr and tap B can fill 1/6 of tank in 6 hrs then how long will it take to fill the tank if both taps ...
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