Check sibling questions

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

Get live Maths 1-on-1 Classs - Class 6 to 12


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

Ask a doubt
Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.