Page 209 - Math Genius C4

E:\Working\Orange_Education\Math_Genius_4\Open_Files\Chap-11
\\September 30, 2025 12:00 PM Bharat Arora P-9 Reader _________________________ Date: ___________________74

(c) 1 hour = 60 minutes

4 hours = 4 × 60 minutes = 240 minutes
4 hours 8 minutes = 240 minutes + 8 minutes

= 248 minutes
(d) 1 hour = 60 minutes and 1 minutes = 60 seconds

1 hour = 60 × 60 seconds = 3600 seconds

2 hours = 2 × 3600 seconds = 7200 seconds

15 minutes = 15 × 60 seconds = 900 seconds

So, 2 hours 15 minutes 18 seconds = 7200 seconds + 900 seconds
+ 18 seconds = 8118 seconds.

Š To convert seconds into minutes, divide the seconds by 60.

Š To convert minutes into hours, divide the minutes by 60. Be Aware
example 2: Convert the following: To find the number of
(a) 360 seconds into minutes. hours in given seconds,
we divide the seconds by
(b) 1210 seconds into minutes and seconds. 60 to find the number
of minutes, and further
(c) 512 minutes into hours and minutes. divide by 60 to find the
number of hours.
(d) 4800 seconds into hours, minutes and seconds.

Solution: 60 360 6 minutes

(a) 60 seconds = 1 minute 360
00
360 seconds = (360 ÷ 60) minutes

= 6 minutes 60 1210 20 minutes
120
(b) 60 seconds = 1 minute 10 seconds
1210 seconds = (1210 ÷ 60) minutes

= 20 minutes and 10 seconds 60 512 8 hours
480
(c) 60 minutes = 1 hour 32 minutes

512 minutes = (512 ÷ 60) hours

= 8 hours 32 minutes 60 4800 80 minutes
480
(d) 4800 seconds = (4800 ÷ 60) minutes 00 seconds

= 80 minutes
60 80 1 hour
Further, 80 minutes = (80 ÷ 60) hours. 60

Thus, 4800 seconds = 1 hour 20 minutes 0 seconds. 20 minutes

Mathematics-4 207