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 13.7

Page No:233

Questions No:1

(i) radius 6 cm, height 7 cm

(ii) radius 3.5 cm, height 12 cm

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(I) Radius of cone r = 6 cm and height h = 7 cm

Volume of cone = 1/3πr²h

= 1/3 × 22/7 × 6 × 6 × 7 = 264 cm³

Hence, the volume of right circular cone is 264 cm³.

(II) Radius of cone r = 3.5 cm and height h = 12 cm

Volume of cone = 1/3πr²h

= 1/3 × 22/7 × 3.5 × 3.5 × 12 = 154 cm³

Hence, the volume of right circular cone is 154 cm³.