Question 74

A sector of a circle subtending angle 36° has an area 3.85 $$cm^{2}$$. The length of the arc is

Solution

The area of the arc = $$ \frac{36}{360} * \pi * r^2$$ = 3.85

Solving, we get r = 3.5

Length of the arc = $$ \frac{36}{360} * 2 * \pi * r$$ = 2.2

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