Ex 11.3, 4 - Chapter 11 Class 9 Surface Areas and Volumes

Last updated at July 22, 2026 by

Ex 11.3, 4 - If the volume of a right circular cone of - Ex 11.3 - Ex 11.3

part 2 - Ex 11.3, 4 - Ex 11.3 - Serial order wise - Chapter 11 Class 9 Surface Areas and Volumes

 

Remove Ads

Transcript

Ex 11.3, 4 If the volume of a right circular cone of height 9 cm is 48 cm3, find the diameter of its base. Height of cone = h = 9 cm Let radius of cone = r cm Given Volume of cone = 48 cm3 1/3 r2h = 48 1/3 r2 (9) = 48 " " 23="48 " r2 = (48 )/3 r2 = 16 r = 16 r = ((4)2) r = 4 cm Diameter = 2 Radius Thus, the diameter of the base of cone is 8 cm.

Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh is an IIT Kanpur graduate and has been teaching for 16+ years. At Teachoo, he breaks down Maths, Science and Computer Science into simple steps so students understand concepts deeply and score with confidence.

Many students prefer Teachoo Black for a smooth, ad-free learning experience.