A can do a piece of work in 12 days and B can do it in 30 days. They work on alternate days; starting with A. In how many days will the work be completed?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e.
Given:
A can do a piece of work in 12 days and B can do it in 30 days
Calculations:
Total work (LCM of 12 and 30) = 60 units
Efficiency of A = 60/12 = 5 units
Efficiency of B = 60/30 = 2 units
As they work on alternate days so,
Work done in 2 days = 7 units
Work done in 16 days = 56 units
Remaining units = 60 - 56 = 4 units
A will complete the remaining work = (4/5) days
Total days = 16 + (4/5) = days