Question : A and B together can do a piece of work in 6 days and A alone can do it in 9 days. The number of days B will take to do it alone is:
Option 1: 18 days
Option 2: 24 days
Option 3: 9 days
Option 4: 12 days
Correct Answer: 18 days
Solution :
A and B together can do a piece of work in 6 days.
So in 1 day, they can do
Also A alone can do it in 9 days.
⇒ In 1 day he alone can do
⇒ B alone in 1 day can do
Hence, the correct answer is 18 days.
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