STD 5 - clock

What is the angle between the hour arm and the minute arm of a clock at 3:15.



Answer:
in one hour the hour arm moves by 30 degrees (360/12 = 30)
so, in 15 minutes the hour arm will move by (15/60) x 30 = 7.5 degrees
So, the hour arm at 3:15 is ahead of the minute arm by 7.5 degrees.