NCERT Solutions for Class 10 Maths Chapter 13

Important NCERT Questions

Surface areas and Volumes,

NCERT Books for Session 2022-2023

CBSE Board and UP Board Others state Board

EXERCISE 13.2

Page No:248

Questions No:6

# A solid iron pole consists of a cylinder of height 220 cm and base diameter 24 cm, which is surmounted by another cylinder of height 60 cm and radius 8 cm. Find the mass of the pole, given that 1 cm3 of iron has approximately 8g mass.

Share

Get Hindi Medium and English Medium NCERT Solution for Class 10 Maths to download.

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

https://www.tiwariacademy.com/ncert-solutions/class-10/maths/chapter-13/

Radius of larger cylinder (r₁) = 12 cm

Height of larger cylinder (h₁) = 220 cm

Radius of smaller cylinder (r₂) = 8 cm

Height of smaller cylinder (h₂) = 60 cm

Volume of pole = Volume of larger sylinder + Volume of smaller cylinder

= πr₁ ²h₁ + πr₂² h₂

=π(12)² 220 + π(8)² × 60

= π[144 × 220 + 64 × 60] = 3.14 35520 = 111532.8 cm³

Mass of 1 cm³ of iron = 8 g

Therefore, the mass of 111532.8 cm³ of iron

= 111532.8 × 8 g = 892262.4g = 892.262 kg