NCERT Solutions for Class 9 Maths Chapter 13

Important NCERT Questions

Surface Areas and Volumes

NCERT Books for Session 2022-2023

CBSE Board, UP Board and Other state Boards

EXERCISE 13.8

Page No:236

Questions No:1

# Find the volume of a sphere whose radius is (i) 7 cm (ii) 0.63 m

Share

Get Hindi Medium and English Medium NCERT Solution for Class 9 Maths to download.

Please follow the link to visit website for first and second term exams solutions.

https://www.tiwariacademy.com/ncert-solutions/class-9/maths/chapter-13/

Radius of sphere r = 7 cm

Therefore, volume of sphere = 4/3πr³

= 4/3 × 22/7 × 7 × 7 × 7 = 4/3 × 22 × 7 × 7 = 1437(1/3) cm³

Hence, the volume of sphere = 4/3πr³

= 4/3 × 22/7 × 0.63 × 0.63 × 0.63 = 4 × 22 × 0.03 × 0.63 × 0.63 = 1.05 m³(approx.)

Hence, the volume of sphere is 1.05 m³.