Check sibling questions

Ex 12.2, 10 - Chapter 12 Class 10 Areas related to Circles (Term 1)

Last updated at May 29, 2018 by

Ex 12.2, 10 - An umbrella has 8 ribs which are equally spaced - Ex 12.2

Ex 12.2, 10 - Chapter 12 Class 10 Areas related to Circles - Part 2

This video is only available for Teachoo black users

Subscribe Now

Introducing your new favourite teacher - Teachoo Black, at only ₹83 per month

Join Teachoo Black

Transcript

Ex 12.2, 10 An umbrella has 8 ribs which are equally spaced (see figure). Assuming umbrella to be a flat circle of radius 45 cm, find the area between the two consecutive ribs of the umbrella. Area of rib = 1/8 Area of umbrella Radius = r = 45 cm Area of umbrella = Area of circle = 2 = (45)2 = 22/7 "45" 45 = 22/7 2055 Area of rib = 1/8 area of umbrella = 1/8 22/7 2025 = (11 2025)/(4 7) = 22275/28 cm2 Hence, Area between two consecutive rib = 22275/28 cm2

Davneet Singh's photo - Teacher, Engineer, Marketer

Made by

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.