Go Pro
Exam guides
UPSC CSEBankingSSCRailwayState PSCDefence
Study material
FlashcardsFormula sheetsEssay topicsAbbreviationsImportant daysImportant eventsPrevious year papersDownloads
Log in Sign up

Home › Quantitative Aptitude › Time & Work

Time & Work — Quantitative Aptitude Questions & Practice

Practise 24 Time & Work questions from Quantitative Aptitude for competitive exams such as UPSC, Banking, SSC and Railway. Read the worked questions below, check every answer with an explanation, and track what you get wrong.

Practise this topic

24 questions · 0 quizzes · free to start

Practice questions on Time & Work — with answers

Try each question first, then open the answer. Explanations are included.

1. A can complete a piece of work in 10 days, and B can complete the same work in 15 days. Working together, in how many days will they complete the work?

  1. A6
  2. B5
  3. C7
  4. D8
Show answer

Answer: A

A's 1-day work = 1/10; B's 1-day work = 1/15. Combined 1-day work = 1/10+1/15 = 25/150. Time together = 150/25 = 6 days.

2. A can complete a piece of work in 12 days, and B can complete the same work in 18 days. Working together, in how many days will they complete the work?

  1. A6.2
  2. B7.2
  3. C8.2
  4. D9.2
Show answer

Answer: B

A's 1-day work = 1/12; B's 1-day work = 1/18. Combined 1-day work = 1/12+1/18 = 30/216. Time together = 216/30 = 7.2 days.

3. A can complete a piece of work in 8 days, and B can complete the same work in 12 days. Working together, in how many days will they complete the work?

  1. A3.8
  2. B5.8
  3. C4.8
  4. D6.8
Show answer

Answer: C

A's 1-day work = 1/8; B's 1-day work = 1/12. Combined 1-day work = 1/8+1/12 = 20/96. Time together = 96/20 = 4.8 days.

4. A can complete a piece of work in 20 days, and B can complete the same work in 30 days. Working together, in how many days will they complete the work?

  1. A11
  2. B13
  3. C14
  4. D12
Show answer

Answer: D

A's 1-day work = 1/20; B's 1-day work = 1/30. Combined 1-day work = 1/20+1/30 = 50/600. Time together = 600/50 = 12 days.

5. A can complete a piece of work in 15 days, and B can complete the same work in 20 days. Working together, in how many days will they complete the work?

  1. A8.57
  2. B7.57
  3. C9.57
  4. D10.57
Show answer

Answer: A

A's 1-day work = 1/15; B's 1-day work = 1/20. Combined 1-day work = 1/15+1/20 = 35/300. Time together = 300/35 = 8.57 days.

Practise more Time & Work questions

More Quantitative Aptitude topics

Percentage (960)Simple Interest (492)Profit and Loss (456)Discount (446)Compound Interest (437)Time and Work (369)Mensuration (357)Time, Speed and Distance (304)Average (282)Ratio and Proportion (256)Simplification (219)Problems on Ages (201)Pipes and Cisterns (177)LCM and HCF (172)Boats and Streams (94)Number System (56)Number Series (52)Time, Speed & Distance (41)All Quantitative Aptitude →