CBSE Class 8 Mathematics Time and Work MCQs Set 26

Download CBSE MCQs for Class 8 Mathematics: Time and Work

Explore reliable objective questions for Time and Work tailored for Class 8 learners. Utilizing these Mathematics multiple-choice formats ensures thorough preparation and strengthens problem-solving speed for upcoming school assessments.

Chapter-wise Objective Questions: Time and Work

View or download the dedicated Time and Work MCQ resource below. Practicing these 50 objective questions regularly builds familiarity with standard exam patterns and helps secure higher marks in final Mathematics evaluations.

Multiple Choice Questions

Question 1: Amit can do a piece of work in 4 days and Sumit in 6 days. Working together they take:
(a) 5 days
(b) 2 days
(c) 2.4 days
(d) 3 days
Show Answer & Explanation

Answer: (c) 2.4 days

Explanation:
1. Rate together = 1/4 + 1/6 = 5/12 of the work per day.
2. Time = 12/5 days.

Teacher's Note:
1. Work done per day by a person = 1 / (days taken alone); add the daily rates of people working together.
2. Time taken together = 1 / (sum of the daily rates).

Question 2: Kami, Karya and Kirti together weave a carpet in 4 days. Kami alone takes 12 days and Kirti alone takes 10 days. Karya alone takes (in days):
(a) 12 days
(b) 20 days
(c) 18 days
(d) 15 days
Show Answer & Explanation

Answer: (d) 15 days

Explanation:
1. Total rate = 1/4; Kami 1/12 and Kirti 1/10.
2. Karya = 1/4 - 1/12 - 1/10 = 4/60 = 1/15, so 15 days.

Teacher's Note:
1. Work done per day by a person = 1 / (days taken alone); add the daily rates of people working together.
2. Time taken together = 1 / (sum of the daily rates).

Question 3: A can do a piece of work in 25 days and B in 20 days. They work together for 5 days and then A goes away. B finishes the remaining work in (days):
(a) 11 days
(b) 9 days
(c) 15 days
(d) 12 days
Show Answer & Explanation

Answer: (a) 11 days

Explanation:
1. Work in 5 days = 5(1/25 + 1/20) = 9/20.
2. Remaining = 11/20; B takes 11/20 x 20 = 11 days.

Teacher's Note:
1. Work done per day by a person = 1 / (days taken alone); add the daily rates of people working together.
2. Time taken together = 1 / (sum of the daily rates).

Question 4: A and B can polish the floors of a building in 25 days. A alone can do 1/3 of the job in 15 days. B alone takes (in days):
(a) 50 days
(b) 56.25 days
(c) 20 days
(d) 45 days
Show Answer & Explanation

Answer: (b) 56.25 days

Explanation:
1. A alone takes 45 days.
2. 1/B = 1/25 - 1/45 = 4/225, so B takes 225/4 days.

Teacher's Note:
1. Work done per day by a person = 1 / (days taken alone); add the daily rates of people working together.
2. Time taken together = 1 / (sum of the daily rates).

Question 5: 15 boys earn Rs. 900 in 5 days. 20 boys in 7 days earn (in Rs.):
(a) Rs. 1200
(b) Rs. 1400
(c) Rs. 2000
(d) Rs. 1680
Show Answer & Explanation

Answer: (d) Rs. 1680

Explanation:
1. Earning per boy per day = 900/(15 x 5) = 12.
2. 20 x 7 x 12 = 1680.

Teacher's Note:
1. Work done per day by a person = 1 / (days taken alone); add the daily rates of people working together.
2. Time taken together = 1 / (sum of the daily rates).

Question 6: Spinning 3 hours daily, Kanta can spin 2 kg of cotton-balls in 12 days. Spinning 4 hours daily, she takes how many days to spin 10 kg?
(a) 45 days
(b) 40 days
(c) 36 days
(d) 60 days
Show Answer & Explanation

Answer: (a) 45 days

Explanation:
1. 2 kg needs 36 hours, so 10 kg needs 180 hours.
2. At 4 hours a day: 180/4 = 45 days.

Teacher's Note:
1. Work done per day by a person = 1 / (days taken alone); add the daily rates of people working together.
2. Time taken together = 1 / (sum of the daily rates).

Question 7: Somari sweeps a 600 m platform in 2 1/2 hours. His wife Imarati sweeps 2/3rd of the same platform in 1 1/2 hours. Who sweeps more speedily?
(a) Somari
(b) Both sweep equally
(c) Cannot be determined
(d) Imarati
Show Answer & Explanation

Answer: (d) Imarati

Explanation:
1. Somari: 600/2.5 = 240 m per hour.
2. Imarati: 400/1.5 = 266 2/3 m per hour, which is faster.

Teacher's Note:
1. Work done per day by a person = 1 / (days taken alone); add the daily rates of people working together.
2. Time taken together = 1 / (sum of the daily rates).

Question 8: A cistern can be filled by one tap in 4 hours and by another in 3 hours. With both taps open it fills in (hours):
(a) 2 hours
(b) 7 hours
(c) 7/12 hours
(d) 1 5/7 hours
Show Answer & Explanation

Answer: (d) 1 5/7 hours

Explanation:
1. Rate = 1/4 + 1/3 = 7/12.
2. Time = 12/7 hours.

Teacher's Note:
1. Work done per day by a person = 1 / (days taken alone); add the daily rates of people working together.
2. Time taken together = 1 / (sum of the daily rates).

Question 9: Pipe A can fill a tank in 6 hours and pipe B in 8 hours. Both are opened and after 2 hours pipe A is closed. B takes how many more hours to fill the remaining tank?
(a) 5 hours
(b) 2 hours
(c) 3 1/3 hours
(d) 4 hours
Show Answer & Explanation

Answer: (c) 3 1/3 hours

Explanation:
1. In 2 hours both fill 2(1/6 + 1/8) = 7/12.
2. Remaining 5/12 by B alone: 5/12 x 8 = 10/3 hours.

Teacher's Note:
1. Work done per day by a person = 1 / (days taken alone); add the daily rates of people working together.
2. Time taken together = 1 / (sum of the daily rates).

Question 10: A pipe can fill a cistern in 6 hours. Due to a leak it is filled in 7 hours. When the cistern is full, the leak alone empties it in (hours):
(a) 48 hours
(b) 13 hours
(c) 42 hours
(d) 36 hours
Show Answer & Explanation

Answer: (c) 42 hours

Explanation:
1. Leak rate = 1/6 - 1/7 = 1/42.
2. Time = 42 hours.

Teacher's Note:
1. Work done per day by a person = 1 / (days taken alone); add the daily rates of people working together.
2. Time taken together = 1 / (sum of the daily rates).

Question 11: Taps A and B fill a tank in 12 and 16 hours; a third tap empties the full tank in 8 hours. With all three on, the empty tank fills in (hours):
(a) 24 hours
(b) 48 hours
(c) 16 hours
(d) 96 hours
Show Answer & Explanation

Answer: (b) 48 hours

Explanation:
1. Net rate = 1/12 + 1/16 - 1/8 = (4 + 3 - 6)/48 = 1/48.
2. Time = 48 hours.

Teacher's Note:
1. Work done per day by a person = 1 / (days taken alone); add the daily rates of people working together.
2. Time taken together = 1 / (sum of the daily rates).

Free study material for Mathematics

Download Chapter MCQs: Class 8 Mathematics Time and Work

Class 8 Mathematics Time and Work Objective Test Questions

Review structured objective questions for Class 8 Mathematics Time and Work. Built according to official CBSE guidelines, these MCQ sets support daily revision and core concept reinforcement.

NCERT-Aligned Objective Questions and Solutions

Each question includes structured solution keys mapped directly to standard CBSE textbooks, helping students evaluate their reasoning and correct mistakes early in their revision.

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FAQs

Where can I access latest CBSE Class 8 Mathematics Time and Work MCQs Set 26?

You can get most exhaustive CBSE Class 8 Mathematics Time and Work MCQs Set 26 for free on StudiesToday.com. These MCQs for Class 8 Mathematics are updated for the 2026-27 academic session as per CBSE examination standards.

Are Assertion-Reasoning and Case-Study MCQs included in the Mathematics Class 8 material?

Yes, our CBSE Class 8 Mathematics Time and Work MCQs Set 26 include the latest type of questions, such as Assertion-Reasoning and Case-based MCQs. 50% of the CBSE paper is now competency-based.

How do practicing Mathematics MCQs help in scoring full marks in Class 8 exams?

By solving our CBSE Class 8 Mathematics Time and Work MCQs Set 26, Class 8 students can improve their accuracy and speed which is important as objective questions provide a chance to secure 100% marks in the Mathematics.

Do you provide answers and explanations for CBSE Class 8 Mathematics Time and Work MCQs Set 26?

Yes, Mathematics MCQs for Class 8 have answer key and brief explanations to help students understand logic behind the correct option as its important for 2026 competency-focused CBSE exams.

Can I practice these Mathematics Class 8 MCQs online?

Yes, you can also access online interactive tests for CBSE Class 8 Mathematics Time and Work MCQs Set 26 on StudiesToday.com as they provide instant answers and score to help you track your progress in Mathematics.