A can finish one-third of the work in 5 days, and B can finish 50% of the same work in 15 days. If they work together, then in how many days will they finish 50% of the work?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 5.
Time taken by A to complete whole work = 5 × 3 = 15 days
Time taken by B to complete whole work = 15 × 2 = 30 days
LCM(15, 30) = 30
The efficiency of A = 30/15 = 2 units
The efficiency of B = 30/30 = 1 units
Time taken to finish 50% of the work = = = 5 days