Basic concepts for solving clocks problem

Basic Concept of Clocks:

• A clock is a complete circle having 360 degrees. It is divided into 12 equal parts i.e. each part is 360/12 = 30°.
• There are 60 minute spaces in the clock.
• In 1 minute minute hand it covers 360/60 = 6°/ minute. 
• In 1 minute , hour hand covers 1/2‘ (half degree).
• This implies that the relative speed of the minute hand is 6 - ½ = 5 ½ degrees. 
• If both the hour hand and minute hand move at their normal speeds, then both the hands meet after 65 minutes.