Question

A circular clock's minute hand is $10cm$ long. How far does the tip of the minute hand move in $1$ hour. (Take $\pi =3.14$)

• A. $62.8cm$
• B. $74cm$
• C. $83.1cm$
• D. $92cm$

Answer 1

The correct option is A $62.8cm$

Given: Length of minute hand $=10cm$

The minute hand of a clock moves in circular path. After $1$ hour it completes one circle.

So, the minute hand can be taken as the radius.

The path moved will be the circumference.

Circumference of a circle $=2\pi r$

$=2\times 3.14\times 10$

$=20\times 3.14$

$=62.8cm$