Mathematics · Time and Work
P and Q together can complete a work in 21 days. Q alone can complete it in 84 days. If the efficiency of Q becomes double, then in how many days approximately will P and Q together complete the work?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 140 days
- 237 days
- 317 days✓
- 433 days
Correct answer
17 days
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