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\ 03-Oct-2025 Bharat Arora Proof-10 Reader’s Sign _______________________ Date __________

For examples: (a) 3rd February, 2024 or February 3, 2024 Look at the relationships between the units of time.

(b) 10th March, 2024 or March 10, 2024 1 hour = 60 minutes 1 month = 30 days
(c) 31st July, 2025 or July 31, 2025 1 day = 24 hours 1 year = 12 months

In short, we write a date as a group of three numbers separated by two dots (.) or slashes 1 week = 7 days 1 year = 365 days

(/). The first number stands for the day, the second number for the month and the third Example 1: Mohit practised cricket for 180 minutes. For how many hours did he practise
number is the year. cricket?

For example: 15th August, 1947 can be written in the short form as: Solution: 60 minutes = 1 hour
180 minutes = 180 ÷ 60 = 3 hours
15 . 08 . 1947 15 / 08 / 1947
or Thus, Mohit practised cricket for 3 hours.
Example 2: Convert:

Day Month Year Day Month Year (a) 8 minutes into seconds. (b) 4 hours into minutes. (c) 5 days into hours.
Solution:

www
(a) 1 minute = 60 seconds (b) 1 hour = 60 minutes (c) 1 day = 24 hours
MAths connect Cross-Curricular Learning
Fill in the blanks using the clue box. 8 minutes = 60 × 8 seconds 4 hours = 4 × 60 minutes 5 days = 5 × 24 hours

India got freedom on ________ from British rule. = 480 seconds = 240 minutes = 120 hours

The Constitution of India was adopted by the Constituent Assembly on ______ and Example 3: Convert:
came into force on __________. (a) 6 months into days. (b) 7 weeks into days.

Clue Box: 15th August, 1947; 26th January, 1950; 26th November, 1949 Solution: (a) 1 month = 30 days (b) 1 week = 7 days
6 months = 30 × 6 days = 180 days 7 weeks = 7 × 7 days = 49 days

Conversion of units of time Think Tank Critical Thinking Challenge Question
How many hours and minutes are
Kushal is taking a test at school. there in the following: Neha was born on 8th March 2017.

1 1 1 Help Neha find her exact age on
Teacher: You have only 15 minutes left to finish the test. 1. day 2. day 3. day
2 3 4 31st July 2025.
Kushal: Ma’am, how long is our test in minutes?

Teacher: The test is for 1 hour 15 minutes, which is 75 minutes. Practice time 10f

Kushal: How? 1. Write the following dates in two ways:

Teacher: 1 hour = 60 minutes (a) January 4, 2003 (b) April 21, 2014 (c) 16.11.2018
2. Convert the following.
So, 1 hour and 15 minutes = 1 hour + 15 minutes
(a) 2 hours into minutes (b) 8 hours into minutes (c) 1 day into hours
= 60 minutes + 15 minutes (d) 1 day into minutes (e) 5 days into minutes (f) 19 weeks into days

= 75 minutes (g) 24 weeks into days (h) 10 months into days (i) 4 years into days

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