Mathematics · Time and Work
A can do a certain work in 15 days. B is 10% less efficient than A, and C is 20% more efficient than A. All three work together for 3 days. The remaining work is completed by D alone in 9(1/2) days. In how many days can D alone complete the original work?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 118 days
- 215 days
- 325 days✓
- 420 days
Correct answer
25 days
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