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23 November, 03:13

Given two circles x2+y2=9 and x2+y2=25 find the difference between the radius of the large circle and the radius of small circle

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  1. 23 November, 03:25
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    Equation of a circle with center at the origin is given by x^2 + y^2 = r^2

    First circle: x^2 + y^2 = 9 = > x^2 + y^2 = 3^2 = > radius is 3.

    Second circle: x^2 + y^2 = 25 = > x^2 + y^2 + 5^2 = > radius is 5

    Difference in radius = 5 - 3 = 2.
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