Question

15. The minute hand of a watch has a length

of 1.4 cm. Find the:
(a) distance moved by the tip of the minute
hand from 8.13 a.m. to 8.49 a.m.
(b) angle swept by the minute hand if the
tip moves 8.8 mm
(e) time it will be when the minute hand
sweeps the angle calculated in (b), if
the minute hand started moving at
8.39 a.m​

Answer 1

Explanation:

Imagine the clock as a normal circle, with the minute hand as its radius.

a. Here, we are asked for the circumference of a small arc.

Find the circumference of whole clock:

pi x r x 2 = 3.14 x 2.8 = 8.792

Now calculate the distance in just that section of the clock

36/720 x 8.792 = 1/20 x 8.792 = 0.4396