Mathematics · Time and Work
In a computer game, a builder can construct a wall in 20 hours, while a destroyer can completely demolish it in 50 hours. Both the builder and the destroyer were initially assigned to work together on flat ground. After 30 hours, the destroyer was removed. What was the total time taken to construct the wall completely?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 133 hours 20 minutes
- 232 hours
- 332 hours 40 minutes✓
- 432 hours 20 minutes
Correct answer
32 hours 40 minutes
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