Question : If A and B together can do a piece of work in 20 days, and A alone can do the same work in 30 days, in how many days can B alone complete the same work?
Option 1: 45
Option 2: 40
Option 3: 60
Option 4: 50
Latest: SSC CGL preparation tips to crack the exam
Don't Miss: SSC CGL complete guide
Correct Answer: 60
Solution :
A and B together can do a piece of work in 20 days.
Part of the work A and B together can do in 1 day $=\frac{1}{20}$
A alone can do the work in 30 days.
Part of the work A can do in 1 day $=\frac{1}{30}$
$\therefore$ Part of the work B alone can do in a day $=\frac{1}{20} – \frac{1}{30} = \frac{1}{60}$
So, B will complete the work in 60 days.
Hence, the correct answer is 60 days.
Related Questions
Know More about
Staff Selection Commission Combined Grad ...
Answer Key | Eligibility | Application | Selection Process | Preparation Tips | Result | Admit Card
Get Updates Brochure
Your Staff Selection Commission Combined Graduate Level Exam brochure has been successfully mailed to your registered email id “”.
Upcoming Exams
Trending Articles around SSC CGL
