A can do apiece of work in 12 days and B can do the same work in 15 davs. If both do the work together, then in how many davs will the work be completed?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. .
Given that
A can do apiece of work in 12 days
B can do the same work in 15 days
Total works = LCM (12, 15) =60
The efficiency of A = 60 /12 = 5
The efficiency of B = 60 /15 = 4
Hence, the work is completed by A and B together in = 60/(4 + 3) = 60/7 = days