A tap can fill a tank in 10 hours and another tap can do so in 5 hours. The first tap is opened and allowed to run for 2 hours. Then the second tap is also opened. How long will it take (total time) for the tank to be filled?
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The second tap will open 4 hours
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Answer:
20 hour.
5 ×2×10 =20
I hope it help you
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