Ex 11.2, 6 - Chapter 11 Class 9 Surface Areas and Volumes

Last updated at April 16, 2024 by

Slide12.JPG

 

Go Ad-free

Transcript

Ex 11.2 , 6 Assume = 22/7, unless stated otherwise. Find the radius of a sphere whose surface area is 154 cm2. Let r be the radius of the sphere. Surface area = 4 2 154 cm2 = 4 2 154 cm2 = 4 22/7 2 154 7/(22 4) cm2 = 2 2 = 12.25 r = 12.25 r = 3.5 Thus, the radius of the sphere is 3.5 cm

Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo