Mathematics · Time and Work
Pipes A and B can fill a tank in 18 hours and 30 hours respectively, while pipe C alone can empty the full tank in x hours. All three pipes are kept open for 3 hours, then B is closed. After another 3 hours, C is also closed. If the total time taken to fill the tank completely is 21 hours, what is the value of x?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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22.5
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