Class 8 Relative Speed Case Study Questions
Class 8 Relative Speed Case Study Questions help students understand how two moving objects interact when traveling in the same or opposite directions. Moreover, these questions show how speed differences affect meeting time and crossing time. This makes the concept easier and more engaging.
Why These Case Studies Are Helpful
These worksheets strengthen mathematical reasoning and boost accuracy in Speed–Distance–Time problems. Furthermore, each case study includes step-by-step explanations. As a result, students develop confidence and improve exam performance.
How to Practice the Case Studies
Students should note the direction of motion, compare speeds, and apply the relative speed formula correctly. Additionally, consistent practice builds strong conceptual understanding and improves overall speed.
Case Study 5: Work and Speed, Distance, Time (Variable Rates)
A city charity organised a festival distribution where volunteers must prepare **1080 identical gift packs** for children. Team leaders assign three volunteers: **Leena**, **Manoj** and **Priya**. Based on previous experience, **Leena can prepare 24 packs per hour**, **Manoj can prepare 18 packs per hour** and **Priya can prepare 12 packs per hour**.
They begin work together at 8:00 a.m. After working together for some hours, Priya needs to leave to help with another stall, while Leena and Manoj continue until all packs are ready. Once packing is finished, Leena takes a van to deliver the packs to a partner shelter **300 km** away. She drives the first **100 km at a steady 50 km per hour** because of city traffic, then increases speed for the remainder of the trip so the delivery reaches the shelter on time. Use the data above to calculate combined and individual rates, partial work done, remaining work and time after a volunteer leaves, and speed-distance-time for the delivery.
Quiz Results
Total Questions: 5
Correct Answers: 0
Incorrect Answers: 5
Total Marks: 10
Your Score: 0 / 10
Percentage Score: 0%