Mathematics · Time and Work
It takes 12 hours to fill a swimming pool using two pipes together. If the pipe of larger diameter is used for 4 hours and the pipe of smaller diameter for 9 hours, only half of the pool is filled. How long would it take for the pipe with the larger diameter alone to fill the pool?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 125 hours
- 215 hours
- 320 hours✓
- 430 hours
Correct answer
20 hours
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