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Question

Find the radius of circle in which a central angle of 90 intercepts an arc of length 27.632 cm (use π=3.14)

A
17.6 cm
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B
8.8 cm
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C
0.30 cm
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D
0.60 cm
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Solution

The correct option is A 17.6 cm
Here, l=27.632 cm and
θ=90=90×π180=π2 rad


We know , θ=lr
r=lθ=27.632π2 cm=27.632×23.14 cm=17.6 cm

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