A can do 25% of a work in 7 days, while B can do 2/7 th of the same work in 12…
2021
A can do 25% of a work in 7 days, while B can do 2/7 th of the same work in 12 days. A and B start work together and after 12 days both replace by C, who complete the remaining work in three days. Find in how many days C can complete the same work alone?
- A.
6.5 days
- B.
7.5 days
- C.
8.5 days
- D.
10.5 days
- E.
12.5 days
Attempted by 2 students.
Show answer & explanation
Correct answer: D
A completes the work in 28 days and B in 42 days. In 12 days they complete 5/7 of the work, so C completes the remaining 2/7 in 3 days. C alone takes 10.5 days.