How many degrees would the hour hand move in 4 hours?

We will use the concept of complete angle and the unitary method to find the required angle.

Answer: The hour hand moves 120 degrees in 4 hours

Let's see how we can apply the knowledge of complete angle and unitary method to find the answer.  

Explanation:

When the hour hand completes one revolution then it sweeps 360 degrees.

The hour hand takes 12 hours to complete one revolution.

So, angle swept in 12 hours = 360 degrees.

Angle swept in 1 hour = (360/12) degrees = 30 degrees

Angle swept in 4 hours = (30 × 4) degrees = 120 degrees

Thus, the hour hand moves 120 degrees in 4 hours.