Mathematics, 21.07.2021 19:20 vm204618
SECTION B. SULV MIL A tank can be emptied by one pipe in 30 minutes and another pipe in 20 minutes. When the tank is 2/3 full , how long will it take to empty it when both pipes are open?
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SECTION B. SULV MIL A tank can be emptied by one pipe in 30 minutes and another pipe in 20 minutes....
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