Question

Find the radius of a circle whose arc length is 55 m and its central angle measure if 5radians.

Answer 1

Solution:

The arc length of a circle is given by the following equation:

$L=\theta R$

where theta is the central angle and r is the radius of the circle. Then, replacing the given data into the previous equation, we get:

$55=5R$

solving for R, we get:

$R\text{ = }\frac{55}{5}=\text{ 11}$

then, the correct answer is:

$R\text{ = 11}$