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If the area of a circle is 64pi, which i...

If the area of a circle is `64pi`, which is the circumference of the circle?

A

`8pi`

B

`16pi`

C

`32pi`

D

`64pi`

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • The cicrcumference of a circle is give by the formula C = pid where d is the diameter of the circle. The formula for the area of a circle is A = pir^2 . If the area of the circle is 9pi , what is the circumference of the circle ?

    A
    `9pi`
    B
    9
    C
    `6pi`
    D
    6

  • The area of a circle is 36 pi sq. m Find its circumference.

    A
    `18 pi cm`
    B
    `12 pi cm`
    C
    `14 pi cm`
    D
    `16 pi cm`

  • In the figure shown , AB is a diameter of the circle and O is the center of the circle If A = (3,4) , then what is the circumference of the circle?

    A
    3
    B
    4
    C
    `4pi`
    D
    `10pi`

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