A, B and C can complete a piece of work in 6, 8 and 15 days. C alone works for 5 days and then quit . After that in how many days work is completed by A alone ?
Answer & explanation
Correct answer: option 1
Total work = Efficiency × Number of days
work done by C = 8 × 5 = 40
remaining work = 120 - 40 = 80
so time taken by A to finish the remaining work
= \(\frac{80}{20}\) = 4 days