Question

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

Answer 1

In one hour the minutes hand moves one round so, distance moved =circumference of clock
$=2\pi r$

$2\times 3.14\times 15$ cm
[r=15 cm, as that is the minutes hand lengh]

$=94.2$ cm

$\therefore$ Distance moved by minutes hand= $94.2cm$