Answer:

339.12 cm

Step-by-step explanation:

The hour hand of the clock is given to be 4.5 cm

Now, if we visualize the clock then the length of the hour hand will be the radius of the circle and the distance covered by the hour hand in 1 hour will be equal to the circumference of the circle.

So, radius = 4.5 cm

Circumference = 2π × r

                         = 2×3.14×4.5 = 28.26 cm

This is the distance covered by hour hand in 1 hour.

Therefore, distance traveled by hour hand in 12 hours = 12 × 28.26

                                                                                               = 339.12 cm