Find the radius of the circle in which a central angle of 60° intercepts an arc of length 37.4 cm (use ∏=22/7)

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Find the radius of the circle in which a centrall angle of 60° intercepts an arc of length 37.4 cm (use ∏=22/7)

A39.2 cm

B17.85 cm

C23.8 cm

D35.7 cm

Answer:

l = 37.4cm 𝚹=60° = ∏/180 x 60 = ∏/3 r= l/𝚹 =37.4 x 3/∏ =37.4 x 3 x 7 / 22 =35..7 cm

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