1. The area of a circle is proportional to the square of its radius. A small circle of radius 3 cm is drawn within a larger circle of radius 5 cm. Find the ratio of the areaof the annular zone to the area of the larger circle. (Area of the annular zone is the difference between the area of the larger circle and that of the smaller circle).
Write Comment
Comments
By: anil on 05 May 2019 01.56 am
Area of circle = $$pi r^2$$ Area of annular zone = $$pi (5^2 - 3^2) = 16 pi$$ sq. units Area of larger circle = $$pi * 5^2 = 25 pi$$ sq. units => Required ratio = 16 : 25
Terms And Service:We do not guarantee the accuracy of available data ..We Provide Information On Public Data.. Please consult an expert before using this data for commercial or personal use