Mathematics · Time and Work
X can do a certain work in 40 hours. Y is 25% more efficient than X, and Z is 28% more efficient than Y. Working together, X, Y and Z will complete the same work in how many hours?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1800/77 hours✓
- 2400/11 hours
- 3230/13 hours
- 4160/9 hours
Correct answer
800/77 hours
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