Class 5 Mathematics • Maths Mela • Chapter 12 • Reprint 2026–27
Racing Seconds: concept in one view
This original companion develops seconds, minutes and hours; elapsed time, 12- and 24-hour notation, time intervals, schedules and races. Understand the model, work through the example, complete the hands-on task and justify every answer.
Learning goals
- seconds, minutes and hours
- elapsed time, 12- and 24-hour notation, time intervals, schedules and races
Worked example
A race starts at 10:48:35 and ends at 10:50:05. The elapsed time is 1 minute 30 seconds.
Activity
Time three safe everyday actions. Record each duration in seconds and order them from shortest to longest.
Practice
- Convert 3 minutes 25 seconds to seconds.
- Write 6:45 p.m. in 24-hour time.
- Find the duration from 09:35 to 11:10.
Problem-solving checklist
- Write what is known and what must be found.
- Choose a diagram, model, table or number sentence.
- Estimate before the exact calculation where useful.
- Include the correct unit and check whether the answer is reasonable.
Frequently asked questions
Which current NCERT book contains this chapter?
“Racing Seconds” is Chapter 12 of Class 5 Maths Mela (code eemm1), Reprint 2026–27.
Are the learning-material sheets separate chapters?
No. Fraction kits, shape sheets, number tokens, nets and cut-outs placed after Chapter 15 are supporting materials, not Chapters 16 or beyond.
Is this an official answer key?
No. It is an independently written learning guide. Use the NCERT chapter for the complete tasks and teacher-guided discussion.
Official sources
Source-checked against publication 0533 and the 2026–27 reprint. Legacy Math-Magic Book V titles are excluded.