The radius of the circle whose arc of length 15 cm makes an angle of 3/4 radian at the centre, is
Show Hint
- 10 cm
- 20 cm
- \(11\frac{1}{4}\) cm
- \(22\frac{1}{2}\) cm
The Correct Option is B
Solution and Explanation
Arc length \(s = r\theta\).
Step 2: Detailed Explanation:
\(s = r\theta \rightarrow 15 = r \times \frac{3}{4} \rightarrow r = 15 \times \frac{4}{3} = 20\ \mathrm{cm}\)
Step 3: Final Answer:
20 cm.
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