Mathematics · Time and Work
Pipes A and B can fill a tank in 60 minutes and 90 minutes respectively. Another pipe C can empty the tank in 3 hours. Pipes A and C are opened together. After 30 minutes, A is replaced with B. Find the total time taken to fill the tank this way.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1210 min
- 2180 min
- 3150 min✓
- 4120 min
Correct answer
150 min
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