A alone can make a chair in 40 days and B alone can make the same chair in 24 days. If A and B are working on alternate days and A work on the first day, then in how many days the chair will be completed?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 30 days
If they work alternate , work done in 2 days = 1/40 + 1/24 = 8/120
Hence doing alternatively total work will be done in 1/120 ÷ 8/120 = 15
Total days = 15 × 2 = 30 Days.