A can complete a piece of work in 12 days while B can the same work in 18 days. If they both work together, then how many days will be required to finish the work?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 7.2.
Combined work/day = (1/12 + 1/18) = 5/36
Total time required = 36/5 = 7.2 days