Question

The minute hand of a circular clock is $15cm$ long. How far does the tip of the minute hand move in $1$ hour. (Take $\mathrm{\pi }=3.14$)

Answer 1

Explanation:

In one hour, how far does the minute hand's tip move:

Given,
The minute hand of a circular clock has a length of $15\mathrm{cm}$
We know that
The circumference of the clock is equal to the distance traveled by the tip of the minute hand in one hour
$$\begin{gathered} =2\pi r \\ =2\times 3.14\times 15 \\ =94.2\mathrm{cm} \end{gathered}$$

Therefore , the tip of the minute hand moves $94.2\mathrm{cm}$ in one hour.