A, B and C together can do a work in 4 days, while B alone can do the same…
2024
A, B and C together can do a work in 4 days, while B alone can do the same work in 24 days. If efficiency of C is 300% more than that of B, then find the difference between number of days taken by A and C to complete the work alone?
- A.
18
- B.
12
- C.
11
- D.
15
- E.
20
Attempted by 12 students.
Show answer & explanation
Correct answer: A
B's one-day work is 1/24. C is 300% more efficient than B, so C's rate is 4/24 = 1/6. A + B + C together do 1/4 work per day, so A's rate is 1/4 - 1/24 - 1/6 = 1/24. A takes 24 days and C takes 6 days; the difference is 18 days.