Question

Find the ratio of the circumference of two circles whose radius are in the ratio 4:5​

Answer 1

Answer:

Step-by-step explanation:

Let radius of circles be x

And  Radius of 1st circle 4x

And Radius of 2nd circle 5x

Assuming circumferences, we get

Circumference of circle = 2πr

Circumference of 1st circle = 2 × π × 4x

Circumference of 2nd circle = 2 × π × 5x

Ratio of the circumferences = Circumference of 1st circle/Circumference of 2nd circle .

= 2 × π × 4x/2 × π × 5x

= 4x/5x

= 4/5

= 4 : 5

Hence, the ratio of the circumferences of two circles are 4 : 5.

Answer 2

Answer:

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