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The radius of two circles are r and 4r w...

The radius of two circles are r and 4r what will be the ratio of their Area and perimeter.

A

`(1)/(16)`

B

`1/4`

C

`(16)/(1)`

D

`4/1`

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • The ratio between the area of two circles is 4:7. What will be the ratio of their radii ?

    A
    `2:sqrt(7)`
    B
    `4:7`
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    `16:49`
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    A
    `1:1 `
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    `2:1`
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    `1:2 `
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    `sqrt(pi) : 2`

  • If the area of a circle and a square are equal, then the ratio of their perimeter is

    A
    `1:1`
    B
    `2:pi`
    C
    `pi:2`
    D
    `sqrt(pi):2`

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