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Surface area of a sphere is...

Surface area of a sphere is

A

̀4pir^2 ̀

B

̀3pir^2 ̀

C

̀2pir^2 ̀

D

̀5pir^2 ̀

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Knowledge Check

  • The curved surface area of a sphere will be ……., whose radius is 10 cm.

    A
    `239 pi`
    B
    `400 pi`
    C
    `221 pi`
    D
    `129 pi`

  • The volume and surface area of a sphere are numerically equal. Then the volume of the smallest cylinder in which the sphere is exactly kept

    A
    `54pi`
    B
    `27pi`
    C
    `36pi`
    D
    `9pi`

  • If there is an error 0.05 sq.cm in the surface area of a sphere then the error in its volume when the radius =20 cm is

    A
    1 c.c
    B
    0.5 c.c
    C
    2.5 c.c
    D
    1.5 c.c

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    Find the volume and surface area of a sphere of radius 2.1 cm. (pi=22/7)

    The surface area of sphere is 1018( 2)/(7) . Sq.cm . What is its volume?

    If the surface area of a sphere of radius r is increasing uniformly at the rate cm^(2)//s , then the rate of change of its volume is :

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