Question

The radii of two are in the ratio 3 : 5,find the ratio between their circumferences.​

Answer 1

Answer:

Your answer is in the attachment..

Answer 2

Correct Question

• The radii of two circles are in the ratio 3:5, find the ratio between their circumference.

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Given

• Radius of two circles are 3:5.

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To find

• Ratio of their circumferences.

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Solution

• Let the ratio of radii be x.

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Then,

• Radius of first circle = 3x
• Radius of second circle = 5x

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As we know,

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☆ Circumference = 2πr

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→ Circumference 1 = 2π × 3x

→ Circumference 1 = 6πx

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→ Circumference 2 = 2π × 5x

→ Circumference 2 = 10πx

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Ratio,

⠀⠀❍ Circumference 1 : Circumference 2

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• Required ratio = 6:10
• Required ratio = 3:5

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Hence,

• Ratio of their circumferences is 3:5.