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

Look at the relationships between the units of time.

1 hour = 60 minutes 1 month = 30 days
1 day = 24 hours 1 year = 12 months

1 week = 7 days 1 year = 365 days

Example 1: Mohit practised cricket for 180 minutes. For how many hours did he practise
cricket?
Solution: 60 minutes = 1 hour

180 minutes = 180 ÷ 60 = 3 hours
Thus, Mohit practised cricket for 3 hours.

Example 2: Convert:
(a) 8 minutes into seconds. (b) 4 hours into minutes. (c) 5 days into hours.

Solution:

(a) 1 minute = 60 seconds (b) 1 hour = 60 minutes (c) 1 day = 24 hours

8 minutes = 60 × 8 seconds 4 hours = 4 × 60 minutes 5 days = 5 × 24 hours

= 480 seconds = 240 minutes = 120 hours

Example 3: Convert:

(a) 6 months into days. (b) 7 weeks into days.
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

Think Tank Critical Thinking Challenge Question
How many hours and minutes are
there in the following: Neha was born on 8th March 2017.

1 1 1 Help Neha find her exact age on
1. day 2. day 3. day
2 3 4 31st July 2025.

Practice time 10f

1. Write the following dates in two ways:
(a) January 4, 2003 (b) April 21, 2014 (c) 16.11.2018

2. Convert the following.

(a) 2 hours into minutes (b) 8 hours into minutes (c) 1 day into hours
(d) 1 day into minutes (e) 5 days into minutes (f) 19 weeks into days

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

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