The ratio of the radii of two circles is 4:5 Find the ratio of their areas Find the - Maths - Perimeter and Area

Question

The ratio of the radii of two circles is 4:5 Find the ratio of
their areas Find the ratio of their circumferences also

Priyanka Kedia · Accepted Answer

Dear Student,

Let radii of the circles are r1 and r2 respectively
Given ratio of the radii of two circles, r1r2=45So,Ratio of their areas=πr12πr22=r12r22=r1r22=452=1625⇒Ratio of area of two circle is 16:25And,Ratio of their circumference=2πr12πr2=r1r2=45⇒Ratio of circumference of two circle is 4:5

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The ratio of the radii of two circles is 4:5. Find the ratio of their areas. Find the ratio of their circumferences also.