Question

If a rope of length 15π m is bent to form a circle, then what is the radius of the circle formed?

• A. 15 m
• B. 7.5 m
• C. 30 m
• D. 15$\pi$ m

Answer 1

The correct option is B 7.5 m

The length of the rope will be equal to the circumference of the circle.

Circumference of circle = Length of rope $=2\pi r$

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $\therefore 15\pi =2\times \pi \times r$

$\therefore$ Radius = r = 7.5 m