Mathematics · Time and Work
Three persons A, B, and C can complete a work alone in (z − 5) days, z days, and (z + 10) days respectively. The combined efficiency of A and C together is 100% more than the efficiency of B. All three start working together, but after 4 days, A leaves. B and C continue to work together for 2 more days, after which B also leaves. C completes the remaining work alone. The total time taken to complete the work in this manner can be represented by which of the following expressions?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1(z − 8) days
- 2(z − 5) days
- 3(0.25z + 10) days
- 4(0.5z + 3) days✓
Correct answer
(0.5z + 3) days
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