Page 189 - Math_Genius_V1.0_C3_Flipbook

E:\Working\Focus_Learning\Math_Genius_3_(11-09-2024)\Open_Files\CHAP_10
\ 11-Sep-2024 Surender Prajapati Proof-5 Reader’s Sign _______________________ Date __________

Observe 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 play
cricket?
Solution: 60 minutes = 1 hour
180 minutes = 180 ÷ 60 = 3 hours

Thus, Mohit practised cricket for 3 hours.
example 2: 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 7 weeks = 7 × 7 days
= 180 days = 49 days

example 3: 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

Think and Answer
How many hours and minutes are there in the following:

1 1 1
1. day 2. day 3. day
2 3 4

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

Mathematics-3 187