1. Perimeter of a rectangle is x and circumference of a circle is 8 more than the perimeter of the rectangle. Ratio of radius of circle and length of the rectangle is 1:2 and ratio of length and breadth of rectangle is 7:3. Find the length of the rectangle ?
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By: anil on 05 May 2019 01.35 am
Perimeter of rectangle = x Perimeter of circle =x+8 Given that radius/length = 1/2 So radius = y and length = 2y Now it is also given that length/breadth = 7/3 So length = 7m and breadth = 3m Here we can say that 7m = 2y as both are length of same rectangle Perumeter of rectangle = 2 (7m+3m) = 20m Circumference of circle = 2πR = 2× 3.14× y = 20m +8 M = 4 Hence length if rectangle = 7×4 =28
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