Question

The minute hand of wall clock is 10 cm long find its displacement and the distance covered from 10 a.m. to 10:30 a.m.

Answer 1

Distance:

Here, radius can be taken as 10cm. Between 10am and 10:30am, the angle is 180 degrees, making it a semicircle. To find the distance we must find the circumference of the semicircle which would be

$\pi$ * radius

= $\pi$ * 10 cm

= 31.4cm

Displacement:

That would basically be the diameter so it is 20cm.