2 Answers

Mike DeAngelo · Answer 1 · 2019-03-15T15:55:36+0000

Here we have to use the formula of area of sector, which is

$A = ((\Theta)/(360))*\pi r^2$

Theta = 70 degree, and radius is unknown here. It is given that area = 7 pi .

Substituting the given values in the formula, we will get

$7 \pi = ((70)/(360))*\pi r^2$

$(7 \pi * 360)/(70 \pi)=r^2$

36 = r^2=>r=6ft

Therefore the correct option is the first option .

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