NCERT Solutions for Class 10 Science Chapter 12

Important NCERT Questions

Areas Related To Circles Class,

NCERT Books for Session 2022-2023

CBSE Board and UP Board Others state Board

EXERCISE 12.2

Page No:231

Questions No:10

# An umbrella has 8 ribs which are equally spaced Assuming umbrella to be a flat circle of radius 45 cm, find the area between the two consecutive ribs of the umbrella.

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-12/

Radius = 45 cm

There are total 8 sectors.

Therefore, the angle of each sector= 360°/8 = 45°

The area between the two consecutive ribs = Area of sector

= 45°/360° × πr² = 1/8 × π(45)²

= 1/8 × 22/7 × 45 × 45 = 22275/28 cm²

Here is the video explanation of the above question😮👇