Question

the ratio between the radii of two circles is 5:7.Find the ratio between their circumfrence and area​

Answer 1

Answer:

5 : 7 and 25 : 49 respectively

Step-by-step explanation:

Radii of the circles = 5x and 7x

Their circumferences will be 2 * π * 5x = 10x π, and

                                                2 * π * 7x = 14x π

                                   Hence the ratio of their circumferences will also be 5 : 7

Their areas will be π * r² = π * 25 = 25π, and

                                           π * 49 = 49π

                                   Hence the ratio of their areas will be 25 : 49

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