Question : A and B together can do a certain work in
Option 1: 12 days
Option 2: 8 days
Option 3: 10 days
Option 4: 9 days
Correct Answer: 10 days
Solution :
According to the question,
One day work of A =
One day work of B =
One day work of (A + B) =
⇒
⇒
⇒
⇒
⇒
⇒
Hence, the correct answer is 10 days.