Hard Math Class 9 Level 1

A cone has radius 6 cm and slant height 10 cm. What is its height?

शंकु की त्रिज्या 6 cm और तिर्यक ऊंचाई 10 cm है। उसकी ऊंचाई कितनी होगी?

A 6 cm / 6 cm B 8 cm / 8 cm C 10 cm / 10 cm D 12 cm / 12 cm
Show answer and explanation
Correct Answer

B. 8 cm / 8 cm

Explanation

l² = r² + h² so 100 = 36 + h² and h = 8 cm.

l² = r² + h² इसलिए 100 = 36 + h² और h = 8 cm।

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What is the area of a circle with radius 7 cm when π = 22/7?

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