Question

10.1.1The hour hand of a clock moves from 3 to 9 o'clock. Through how many degrees does it move?

Answer 1

The number of rotation done by hour hand in 12 hr is 360 degree. So hour hand rotates in one hour is,

$\frac{360}{12}=30$

The number of hours covered by hour hand from 3 to 9 is 6 hours.

Determine the angle in degree for 6 hours rotation by hour hand.

$6\cdot30=180$

So hour hand moves by 180 degrees.