A, B, and C together can finish a task in 12 days. A is twice as efficient as B and C alone can do the task in 36 days. In how many days can A and B do the task if C goes on leave?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 18.
Let the total work be 36 units
Efficiency of (A + B) = 3 - 1 = 2
Hence,
Time taken by (A + B) = 36/2 = 18 days