Example 8 - Chapter 13 Class 9 Surface Areas and Volumes (Term 2)
Last updated at Aug. 26, 2021 by
Transcript
Example 8 Find (i) the curved surface area and (ii) the total surface area of a hemisphere of radius 21 cm. Given r = 21 cm Curved Surface Area of hemisphere = 2πr2 = 2 × (22)/7 × 21 × 21 cm2 = 2 × 22 × 3 × 21 cm2 = 2772 cm2 Total Surface Area of hemisphere = 3πr2 = 3 ×( 22)/7 × 21 × 21 cm2 = 3 × 22 × 3 × 21 cm2 = 4158 cm2
Examples
Example 1
Example 2 Important
Example 3
Example 4
Example 5
Example 6 Important
Example 7
Example 8 Important You are here
Example 9
Example 10
Example 11 Important
Example 12
Example 13
Example 14 Important
Example 15
Example 16 Important
Example 17
Example 18 Important
Example 19
Surface Area and Volume Formulas Important
Chapter 13 Class 9 Surface Areas and Volumes (Term 2)
Serial order wise
About the Author
Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.
