Time and Calendar
Category : 2nd Class
Time and Calendar
Hours, Minutes and Seconds
Hour, minute and second are the unit for the measurement of time
24 hours = 1 day;
1 hour= 60 minutes;
1 minute = 60 seconds;
Hence, 1 hour\[=60\times 60=3600\,\sec onds\].
Convert 5 hours in seconds.
(a) 18000 seconds (b) 19000 seconds
(c) 21000 seconds (d) All the above
Answer (a)
Explanation: \[1\,hour=60\times 60=3600\,\sec onds\].
So\[5\,hour=5\times 3600\,\sec onds=18000\,Seconds\]
Clocks
Clocks are the devices that let us know of the times in a day. See the examples given below:
The small hand in a clock is for hour and the big hand is for the measurement of minute.
Example:
Hour hand of a clock is at 3 and minute hand is at 4 then the time will be:
(a) 3 : 20 (b) 3 : 50
(c) 3 : 10 (d) All the above
(e) None of these
Answer (a)
In how many rotation of hour hand of a clock complete 12 hours?
(a) 2 (b) 1
(c) 60 (d) All the above
(e) None of these
Answer (b)
Explanation: Hour hand of a clock complete one rotation in 12 hours.
Digital Clocks
The clocks that shows the time in numbers are called digital clocks. Given below are the examples of digital clocks.
A man walks 2 hours 20 minutes in the morning and 1 hour 30 minutes in the afternoon. Find the total hours he walks in a day.
(a) 3 hours 50 minutes (b) 3 hours 40 minutes
(c) 2 hours 20 minutes (d) All the above
(e) None of these
Answer (a)
Explanation: 2 hour 20 minutes + 1 hour 30 minutes = 3 hours 50 minutes.
Calendar
Calendar is the systematic arrangement of dates and months of the year. There are 12 months in a year.
The following are the name of the months and their number of days:
Name of the months |
Number of days |
January |
31 |
February |
28 (Increased by 1 in leap year) |
March |
31 |
April |
30 |
May |
31 |
June |
30 |
July |
31 |
August |
31 |
September |
30 |
October |
31 |
November |
30 |
December |
31 |
Look at the given calendar of the year 2018:
Example:
How many months of the year have 30 days?
(a) 6 (b) 4
(c) 7 (d) All the above
(e) None of these
Answer (b)
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