Question

Kid had a apple he split with his friends

Answer 1

The approximate diameter of the mirror is;

`20\text{ inches}`

Step-by-step explanation:

Given that the length of ribbon that is enough to go round the circular mirror once is 63 inches which is equal to the circumference of the mirror.

`C=63\text{ inches}`

Recall that the formula for the circumference of a circle is;

`\begin{gathered} C=2\pi r \\ C=\pi d \\ d=(C)/(\pi) \\ \text{where;} \\ C=\text{circumference} \\ r=\text{radius} \\ d=\text{diameter} \end{gathered}`

Substituting the value of C to calculate d;

`\begin{gathered} d=(C)/(\pi)=(63)/(\pi)\text{ inches} \\ d=20.05\text{ inches} \\ d\approx20\text{ inches} \end{gathered}`

Therefore, the approximate diameter of the mirror is;

`20\text{ inches}`