IEMCET BBA/BCA aptitude preparation: Time and work rates — practice worksheet with answers

How to use this worksheet

This independent worksheet checks time and work rates with a new problem, an explanation task and an interleaved related skill. It is not an official IEM question paper, a difficulty forecast or a prescribed timed examination.

Write an attempt first, then compare your method with the visible answers. Record whether a miss came from interpretation, a missing concept, execution or a condition you overlooked.

Question 1: apply the topic

A worker completes one quarter of a job each hour. How long for one job?

Answer and checking point

Four hours.

Return to the wording and test the proposed answer. Check the base of a percentage, the weights in an average and the units in a rate. For language tasks, verify agreement and context without adding facts the passage never supplies.

Question 2: diagnose an approach

Explain why the following warning matters and identify the correction it calls for: Adding individual completion times rather than rates reverses the cooperation calculation.

Model checkpoint: For constant independent rates, completed work adds. Work time is the reciprocal of rate for one complete job. Governing rule: If workers finish alone in a and b time units, combined rate is 1/a+1/b.

Question 3: transfer to simple interest

Find the final amount in that example.

Answer: 2000+300=2300.

This is an interleaved related-skill task, not a claim that the two topics have identical methods. Explain which idea changes when switching from the main topic to this one.

Review the attempt

Separate correct answers reached with a justified method from lucky guesses. Rework missed steps without looking at the answer, then use a fresh problem from an appropriate primary textbook or official paper. Do not use a small worksheet result as an admission cutoff, rank or readiness guarantee.

Official sources and verification

Sources checked on 26 October 2026. A source’s date, programme and campus limit which claims it supports. Official pages may change after review.

1. UEM Kolkata — IEMCET 2026 syllabus and instructions

   Historical course-specific preparation guidance. Some introductory route text conflicts with the central portal.

2. IIT Guwahati — GATE 2026 General Aptitude syllabus

   General transferable aptitude topic reference, not an official detailed IEMCET BBA/BCA blueprint.

Found a discrepancy? Send the page and the official notice for correction.