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Question
The curved surface area of a cone is 308 cm², and its slant height is 28 cm. Find the radius of its base. [Use π = 22/7]
एक शंकु का वक्र-पृष्ठीय क्षेत्रफल 308 सेमी² है और इसकी तिर्यक ऊँचाई 28 सेमी है। इसके आधार की त्रिज्या ज्ञात कीजिए। (π = 22/7 का प्रयोग करें)
A.
3.5 cm
B.
2.5 cm
C.
4.5 cm
D.
5.5 cm
Answer ( Option A)

3.5 cm

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