Question

Robin buys a round wall clock. The radius of the clock is 15 cm. What is the circumference of the clock?

Answer 1

$\begin{gathered}\begin{gathered}\bf \: Given \:  - \begin{cases} &\sf{radius \: = \: 15 \: cm} \end{cases}\end{gathered}\end{gathered}$

$\begin{gathered}\begin{gathered}\bf \: To \: find - \begin{cases} &\sf{Circumference{(circle)}}  \end{cases}\end{gathered}\end{gathered}$

$\large\underline\purple{\bold{Solution :- }}$

Radius of clock, r = 15 cm.

We know that,

• Circumference of circle is given by

$\rm :\implies\: \boxed{ \pink{ \bf \: Circumference{(circle)} \: = \tt \: 2 \: \pi \: r}}$

So,

$\rm :\implies\:Circumference{(circle)} \: = 2 \times \dfrac{22}{7} \times 15$

$\rm :\implies\:Circumference{(circle)} = \dfrac{660}{7}$

$\rm :\implies\:Circumference{(circle)} = 94.28 \: cm$