Tom can do a piece of work in 7 days, whereas Jay can do the same work in 14 days. How long will they take to finish the work if both work together?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 4 days.
Given that
Tom can do a piece of work in 7 days
Jay can do the same work in 14 days
Total work = LCM (7, 14) = 14
The efficiency of Tom = 14/7 = 2
The efficiency of Jay = 14/14 = 1
Hence, they will take to finish the work in = 14/(2 + 1) = 14/3 = 4 days