Question

Qid : 64 - find length of the arc whose central angle is 90° and radius of the circle is 3.5 cm?

Answer 1

length of arc = theta / 360° *2πr
where theta = 90°
r = radius
so length of arc = 90°*2*22*3.5/360°*7
= 1/4*2*0.5*22=22/4
= 5.5 cm

Answer 2

11 cm.......
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