3rd Class Mathematics Calendar Time

Time

Clocks:

• A clock has two hands : (i) long hand and (ii) short hand

• The long hand is called minute hand and the short hand is called hour hand.

• Some clocks have a third hand called second hand. It moves much faster than the other two hands

• The dial of the clock is divided into 12 equal divisions marked as 1,2,3,4,5,6,7,8,9,10,11 and 12

• 1 hour = 60 minutes    I minute = 60 seconds

• \[\therefore \]1 hour = 60 \[\times \] 60 = 3600 seconds

• The hour hand takes 12 hours to complete one round.

• The minute hand takes 1 hour to complete one round.

Some conversions:

• 1 day = 24 hours; 1 week = 7 days; 1 month = 4 weeks; 1 year = 12 months 1 year = 52 weeks; 1 year = 365 days

• The time from 12 midnight to 12 noon is noted as A.M. (Anti Meridian) and the time form

12 noon to 12 midnight as P.M. 4Post Meridian).