Hard Math Class 9 Level 2

The curved surface area of a cone is 550 cm² and radius is 7 cm. What is its slant height?

शंकु का वक्र पृष्ठीय क्षेत्रफल 550 cm² और त्रिज्या 7 cm है। तिर्यक ऊंचाई कितनी होगी?

Show answer and explanation

Correct Answer

C. 25 cm / 25 cm

Explanation

Using πrl = 550 with r = 7 gives 22l = 550 so l = 25 cm.

πrl = 550 में r = 7 रखने पर 22l = 550 इसलिए l = 25 cm।

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