SSC CHSL Time and Work Questions
6 questions on Time and Work for SSC CHSL, including questions from 2024 papers. Each comes with the correct answer and a worked explanation.
- Questions
- 6
- Moderate
- 6
Time and Work questions with solutions
Pooja can complete a piece of work in 6 days and Karan can complete the same work in 12 days. In how many days will they finish it working together?
- (A)4 days
- (B)9 days
- (C)3 days
- (D)6 days
Show answer and explanation
Correct answer: (A) 4 days
Pooja's one-day work = 1/6 and Karan's one-day work = 1/12. Together they do 1/6 + 1/12 = 18/72 = 1/4 of the work per day, so the work is finished in 4 days.
Shortcut: Days together = (a × b)/(a + b) = 72/18 = 4.
Sneha can complete a piece of work in 14 days and Amit can complete the same work in 35 days. In how many days will they finish it working together?
- (A)9 days
- (B)21 days
- (C)10 days
- (D)24.5 days
Show answer and explanation
Correct answer: (C) 10 days
Sneha's one-day work = 1/14 and Amit's one-day work = 1/35. Together they do 1/14 + 1/35 = 49/490 = 1/10 of the work per day, so the work is finished in 10 days.
Shortcut: Days together = (a × b)/(a + b) = 490/49 = 10.
Riya can complete a piece of work in 30 days and Neha can complete the same work in 60 days. In how many days will they finish it working together?
- (A)20 days
- (B)30 days
- (C)19 days
- (D)22 days
Show answer and explanation
Correct answer: (A) 20 days
Riya's one-day work = 1/30 and Neha's one-day work = 1/60. Together they do 1/30 + 1/60 = 90/1800 = 1/20 of the work per day, so the work is finished in 20 days.
Shortcut: Days together = (a × b)/(a + b) = 1800/90 = 20.
Vikram can complete a piece of work in 20 days and Divya can complete the same work in 30 days. In how many days will they finish it working together?
- (A)10 days
- (B)12 days
- (C)11 days
- (D)25 days
Show answer and explanation
Correct answer: (B) 12 days
Vikram's one-day work = 1/20 and Divya's one-day work = 1/30. Together they do 1/20 + 1/30 = 50/600 = 1/12 of the work per day, so the work is finished in 12 days.
Shortcut: Days together = (a × b)/(a + b) = 600/50 = 12.
Riya can complete a piece of work in 12 days and Divya can complete the same work in 24 days. In how many days will they finish it working together?
- (A)7 days
- (B)10 days
- (C)18 days
- (D)8 days
Show answer and explanation
Correct answer: (D) 8 days
Riya's one-day work = 1/12 and Divya's one-day work = 1/24. Together they do 1/12 + 1/24 = 36/288 = 1/8 of the work per day, so the work is finished in 8 days.
Shortcut: Days together = (a × b)/(a + b) = 288/36 = 8.
Anita can complete a piece of work in 10 days and Pooja can complete the same work in 40 days. In how many days will they finish it working together?
- (A)30 days
- (B)7 days
- (C)25 days
- (D)8 days
Show answer and explanation
Correct answer: (D) 8 days
Anita's one-day work = 1/10 and Pooja's one-day work = 1/40. Together they do 1/10 + 1/40 = 50/400 = 1/8 of the work per day, so the work is finished in 8 days.
Shortcut: Days together = (a × b)/(a + b) = 400/50 = 8.
Frequently asked questions
How many SSC CHSL Time and Work questions can I practise here?
6 questions — 6 moderate. 6 are shown on this page with answers and explanations, and the practice set draws from all of them.
How should I practise Time and Work for SSC CHSL?
Read through a few solved questions first to see the method, then take a timed practice set. Afterwards, check which questions you got wrong or spent longest on and redo those before moving on.