Question

Find the distance covered by the tip of the second hand of a clock in $1$ minute if the hand is $8$ cm long.

• A. $16\pi$
• B. $32\pi$
• C. $16$
• D. $32$

Answer 1

The correct option is A $16\pi$

The clock forms a circle with a radius of 8 cm, and the second hand of the clock completes one revolution in one minute.
Radius = 8 cm

$\therefore$ Distance travelled by the tip of second hand in one revolution is equal to the circumference of the circle, which is given by $2\pi r$
$=2\pi \times 8$
$=16\pi$ cm