# Q. A and B can together do a work in 6 days. A can do it alone in 9 days. In how many days can B do it alone?

#### A) 21 days

#### B) 24 days

#### C) 18 days

#### D) 14 days

#### ✔ 18 days

# Additional Information > Exam point of View

Given,

A and B both's one day's work =1/6

A's alone's one day's work =1/9

∴ B's alone one day's work \=1/6−1/9

=(3−2)/18=1/18

Invert value than : 18/1=18 days

**∴ B can finish the work in 18 days**