A is 40% more efficient than B and both together can complete a work in 9⅜…
2020
A is 40% more efficient than B and both together can complete a work in 9⅜ days. If A work for first five days alone and remaining work complete by B, then find in how many days total work will be competed?
- A.
20½ days
- B.
16 days
- C.
15⅕ days
- D.
20 days
- E.
18⅕ days
Attempted by 4 students.
Show answer & explanation
Correct answer: A
Let B's rate be b and A's rate be 1.4b. Together they complete the work in 75/8 days, so B alone would take 22.5 days. A works 5 days, then B finishes the rest in 15.5 days; total time = 20.5 days.