If a Denotes the Area of the Sector of a Circle

Multiple Choice

If A denotes the area of the sector of a circle of radius r formed by the central angle θ, find the missing quantity. If
necessary, round the answer to two decimal places.
- $\theta = 60 ^ { \circ } , \mathrm { A } = 100$ square meters, $\mathrm { r } =$ ?

A) $6.26 \mathrm {~m}$
B) $39.25 \mathrm {~m}$
C) $157 \mathrm {~m}$
D) $13.82 \mathrm {~m}$