Mathematics · Time and Work
A tank can be built by a mason in 12 hours. After working alone for 6 hours, he enlists a boy's assistance and together they complete the remaining task in an additional 5 hours. How much time will it take for the boy to finish the entire work on his own?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 115 hours
- 220 hours✓
- 360 hours
- 450 hours
Correct answer
20 hours
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