We will learn how to calculate the time duration in minutes and in hours.
Time Duration (in minutes)Ron and Clara play badminton every evening. Yesterday, their game started at 5 : 15 p.m. and finished at 5 : 50 p.m. How long did their game last?
50 minutes — 15 minutes 35 minutes.
Rita left for Naira’s house at 7 : 30 p.m. She reached Naira’s house at 8:10 p.m. How long did it take her on the way?
7 : 30 p.m. → 8 : 00 p.m. → 8 : 10 p.m.
It took Rita 40 minutes to reach Naira’s house.
Time Duration (in hours and minutes)
Uma's
flight took off from New Delhi at 11 : 15 in the morning (11 : 15
a.m.). When it arrived in Mumbai, her watch read 1 : 32 in the afternoon
(1 : 32 p.m.). How long was the flight?
Look at the clocks.
Count the number of hours from 11 : 15 to 1 : 15. It is 2 hours.
Count by 5s and 1s to count the minutes from 1 : 15 to 1 : 32.
It is 17 minutes.
The flight was 2 hours and 17 minutes long.
Andy left his home for school at 6 : 30 a.m. He reached school after 40 minutes. At what time did he reach school?
30 minutes + 10 minutes
Andy reached school at 7 : 10 a.m.
Related Concepts
● To Measure the Length of a Linesegment
● Examples on Unit of Mass or Weight
● Units for The Measurement of Capacity
● Examples on Measurement of Capacity
● Antemeridian (a.m.) or Postmeridian (p.m.)
● Calendar
● Reading and Interpreting a Calendar
4th Grade Math Activities
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