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?
Answer & explanation
Correct answer: option 1
A = 12 days, B = 30 days,
⇒ They work on alternate days, starting with A,
1st day = 5 units,
2nd day = 2 units,
Every 2 days, 7 units of work is completed,
So, in 16 days, 56 units of work is completed,
Therefore, in \( { 16}_{ 5}^{4 } \) days, total work is completed.