Time and Work Questions for SBI PO 2026, Practice Free Live Quiz

Time and Work Questions for SBI PO test the relationship between the amount of work completed, efficiency and time. Questions may involve individual workers, combined work, wages, alternate days and pipes and cisterns.

The efficiency method is generally faster than using fractions repeatedly.

Time and Work Questions for SBI PO : Live Quiz

Attempt the free Time and Work live quiz for SBI PO 2026 to evaluate your preparation. The quiz includes exam-oriented questions based on the latest SBI PO pattern, helping you improve calculation speed, accuracy, and identify topics that require more practice.

Q1. A completes a job in 12 days and B completes the same job in 18 days. How long will they take to complete the job together?

Solution:
A’s one-day work = 1/12
B’s one-day work = 1/18

Combined one-day work = 1/12 + 1/18
= 3/36 + 2/36
= 5/36

Time taken together = 1 ÷ (5/36)
= 36/5 days
= 7.2 days

Answer: 7.2 days

Q2. A is twice as efficient as B. If B completes a task in 24 days, how long will A take?

Solution:
Efficiency and time are inversely proportional.

A is twice as efficient as B, so A will take half the time taken by B.

A’s time = 24 ÷ 2
= 12 days

Answer: 12 days

Q3. A and B together complete a task in 10 days. A alone completes it in 15 days. In how many days can B alone complete the task?

Solution:
A and B’s combined one-day work = 1/10
A’s one-day work = 1/15

B’s one-day work = 1/10 − 1/15
= 3/30 − 2/30
= 1/30

Therefore, B alone completes the task in 30 days.

Answer: 30 days

Q4. Twelve workers complete a task in 15 days. How many workers are required to complete the same task in 9 days?

Solution:
For the same amount of work:
Workers × Days = Constant

12 × 15 = Required workers × 9

Required workers = (12 × 15) ÷ 9
= 180 ÷ 9
= 20 workers

Answer: 20 workers

Q5. A, B and C can complete a work in 20, 30 and 60 days respectively. How long will they take to complete the work together?

Solution:
A’s one-day work = 1/20
B’s one-day work = 1/30
C’s one-day work = 1/60

Combined one-day work = 1/20 + 1/30 + 1/60
= 3/60 + 2/60 + 1/60
= 6/60
= 1/10

Therefore, they will complete the work together in 10 days.

Answer: 10 days

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Important Time and Work Concepts

If A completes a job in x days:

A’s one-day work = 1/x

If A and B work together:

Combined work = 1/x + 1/y

Efficiency and time are inversely proportional.

If efficiency ratio is 2:3, the time ratio is 3:2.

Time and Work Shortcuts

Use LCM as total work.
Convert days into efficiency units.
Distribute wages in the ratio of work completed.
In alternate-day questions, calculate work completed in one cycle.
Treat filling pipes as positive and emptying pipes as negative.

Common Mistakes

Adding the number of days directly
Confusing efficiency ratio with time ratio
Ignoring partial work
Incorrectly distributing wages
Treating an outlet pipe as a filling pipe

Also Read
300+ SBI PO English Important Questions	SBI PO Previous Year Question Paper PDF Free Download for Prelims and Mains Exam
SBI PO Syllabus 2026: Complete Guide for Prelims & Mains	Daily Current Affairs for Banking & Govt Exams

FAQs

What is the fastest method for Time and Work?

The LCM-efficiency method is effective for most questions.

Are Pipes and Cisterns related to Time and Work?

Yes. The same work-rate principle applies.

How are wages divided?

Wages are divided in proportion to the work completed by each person.

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