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 13.1
Page No:245
Questions No:9
A wooden article was made by scooping out a hemisphere from each end of a solid cylinder, If the height of the cylinder is 10 cm, and its base is of radius 3.5 cm, find the total surface area of the article.
Share
Radius of hemispherical part = radius of cylindrical part (r) = 3.5 cm
Height of cylindrical part (h) = 10 m
The total surface area of article
= CSA of cylindrical part + CSA of two hemispherical part
= 2πrh + 2 × 2πr²
= 2π × 3.5 × 10 + 2 × 2π × 3.5 ×3.5
= 70π + 49π = 119π
= 119 × (22/7) = 17 × 22 = 374 cm²
Hence, the total surface area of the article is 374 cm²
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/