A can complete a work in 18 days, while B can complete it in 12 days. B worked on it for 4 days. How long will A take to finish the remaining work?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 12 days.
Given:
A can complete a work in 18 days
B can complete it in 12 days
Calculations:
Total work = (LCM of 18, 12) = 36 units
The efficiency of A = 36/18 = 2
The efficiency of B = 36/12 = 3
B worked on it for 4 days
So, the work of B in 4 days = 4 × 3 = 12 units
The remaining work = 36 - 12 = 24 units
Hence, this work is completed by A in = 24/2 = 12 days