Other Measures of Time:
To measure long period of time we use dates, weeks, months and years.
1 year = = 12 months or 365/366 days 1 month = 30/31 days or 4 weeks approx. 1 week = 7 days |
1 hour = 60 minutes 60 seconds = 1 minute |
Keep in Mind
Only February has 28 days. In leap years, it has 29 day
1. Change 7 hours 20 minutes into minutes:
1 hour 60 minutes
Therefore, 7 hour = 7 × 60 minutes = 420 minutes
Now, 7 hours 20 minutes
= 420 minutes + 20 minutes
= 440 minutes
2. Change 6 days into hours:
1 day = 24 hours
Therefore, 6 days 6 × 24 hours
= 144 hours
3. Change 5 months 2 weeks into days:
1 month 30 days.
Therefore, 5 months = 5 × 30 = 150 days
1 week = 7 days
Therefore, 2 weeks = 2 × 7 = 14 days
Now, 5 months 2 weeks
= 150 days + 14 days
= 165 days
4. Change 4 minutes 30 seconds into seconds.
1 minute 60 seconds
Therefore, 4 minutes = 4 × 60
= 240 seconds
Now, 4 minutes 30 seconds
= 240 seconds + 30 seconds
= 270 seconds
Questions and Answers on Time of Longer Period:
I. Fill in the blanks:
(i) 8 months = _____ days
(ii) 4 weeks = _____ days
(iii) 5 hours = _____ minutes
(iv) 8 days = _____ hours
(v) 10 hours = _____ minutes
(vi) 10 minutes = _____ seconds
(vii) 7 months = _____ days
(viii) 2 weeks = _____ hours
Answer:
I. (i) 240 days
(ii) 28 days
(iii) 300 minutes
(iv) 192 hours
(v) 600 minutes
(vi) 600 seconds
(vii) 210 days
(viii) 336 hours
II. Change and write in your note book:
(i) 5 days into hours
(ii) 4 hours 12 minutes into minutes
(iii) 5 weeks and 4 days into days
(iv) 9 minutes 30 seconds into seconds
(v) 5 days and 6 hours into hours
(vi) 3 hours 17 minutes into minutes
(vii) 13 minutes into seconds
(viii) 8 months 12 days into days
Answer:
II. (i) 120 hours
(ii) 252 minutes
(iii) 39 days
(iv) 570 seconds
(v) 126 hours
(vi) 197 minutes
(vii) 780 seconds
(viii) 252 days
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