Question

Estimate the radius of the object.

Answer 1

Given: Circumference of the object (C) = $122$ inches

We know that

Circumference of the circle (C) = $2\mathrm{\pi r}$

⇒ C = $2\mathrm{\pi r}$

⇒ $122=2\times 3.14\times r$ [Since, $\mathrm{C}=122\mathrm{and}\mathrm{\pi }=3.14$]

⇒ r = $\frac{122}{2\times 3.14}$

$\therefore$ r = $19.42$ inches

Hence, the radius of the object is 19.42 inches.