NCERT Extra Questions for Class 5 Maths Chapter 12: Racing Seconds – Free PDF Download

These practice questions revisit time unit conversion, elapsed time, and 24-hour clock reading from Class 5 Maths Chapter 12, Racing Seconds.

Multiple Choice Questions

Q1. How many seconds are there in 3 minutes?
(a) 30 (b) 300 (c) 180 (d) 60
Answer: (c) 180 (3 × 60).

Q2. What is 5:30 p.m. in 24-hour time?
(a) 05:30 (b) 15:30 (c) 17:30 (d) 23:30
Answer: (c) 17:30 (5 + 12 = 17).

Q3. A movie starts at 6:45 p.m. and ends at 9:10 p.m. How long is the movie?
(a) 2 hr 25 min (b) 2 hr 15 min (c) 3 hr 25 min (d) 2 hr 35 min
Answer: (a) 2 hr 25 min.

Q4. Runner A finishes in 58 seconds, Runner B in 1 minute 2 seconds. Who is faster?
(a) Runner A (b) Runner B (c) Same time (d) Cannot tell
Answer: (a) Runner A – 58 seconds is less than 62 seconds (1 min 2 sec).

Short Answer Questions

Q5. Convert 150 seconds into minutes and seconds.
150 ÷ 60 = 2 remainder 30, so 2 minutes 30 seconds.

Q6. Add 2 minutes 48 seconds and 1 minute 35 seconds.
Seconds: 48+35=83=1 min 23 sec. Minutes: 2+1+1(carried)=4. Total: 4 minutes 23 seconds.

Q7. What is 20:00 in 12-hour (a.m./p.m.) format?
8:00 p.m. (20 − 12 = 8).

Q8. A train departs at 14:20 and arrives at 16:05. Find the journey duration.
16:05 − 14:20 = 1 hour 45 minutes.

Word Problems

Q9. Priya starts her homework at 4:15 p.m. and finishes at 5:50 p.m. How long did she take?
5:50 − 4:15 = 1 hour 35 minutes.

Q10. In a 100 m race, three runners finish in 14.2 seconds, 13.9 seconds, and 14.5 seconds. Who wins, and who comes last?
The runner with 13.9 seconds wins (smallest time is fastest); the runner with 14.5 seconds finishes last.

Q11. A bus is scheduled to depart at 09:00 (24-hour time) and the journey takes 2 hours 35 minutes. At what time (24-hour format) does it arrive?
09:00 + 2:35 = 11:35.

Q12. A relay team’s four runners take 32 sec, 29 sec, 35 sec, and 31 sec. What is the team’s total time in minutes and seconds?
32+29+35+31 = 127 seconds = 2 minutes 7 seconds.

Why These Help

These questions repeat unit conversion, elapsed-time subtraction, 24-hour time reading, and comparing/adding race times – the exact skills the chapter builds – with a mix of everyday schedules and sports timings, which is how time questions typically appear in class tests.

Frequently Asked Questions

Q1. Do these questions come directly from the NCERT textbook?
No – these are original practice questions on the same time concepts taught in the chapter, for extra revision.

Q2. Why do trains and buses often use 24-hour time?
Because it avoids any confusion between a.m. and p.m. over a full day’s schedule, which matters when timetables run continuously across midnight.

Q3. What’s the easiest way to subtract two clock times?
Convert both times fully into minutes (or work in stages, subtracting hours and minutes separately, borrowing 60 minutes as 1 hour when needed), rather than subtracting as if the units were base-10.

Q4. How do I add several short time durations together correctly?
Add the seconds first, carry any full minutes (60 or more seconds) into the minutes column, then add the minutes, carrying any full hours (60 or more minutes) if needed.

Q5. Why does a smaller number represent a faster time in a race?
Because the recorded number measures how much time was used to finish – using less time to complete the same distance means moving faster.

See the Chapter 12 Solutions and Revision Notes for the full walkthrough.

Written by Satish

NCERTBooks.org is an independent educational resource run by a small team focused on making official NCERT textbooks easy to find, read, and download for students, parents, and teachers across India. We are not affiliated with NCERT or the Ministry of Education -- we organise publicly available NCERT content by class and subject, verify links against official sources, and build tools (like our in-browser reader) that make studying more convenient. Every guide we publish is written and reviewed by our team based on the actual NCERT curriculum and syllabus.