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Estimate the order of magnitude of surfa...

Estimate the order of magnitude of surface area of earth.

Text Solution

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The correct Answer is:
15
As is known, radius of earth, `R = 6.4xx10^6m`
surface area of earth` = 4pi R^2`
`=4xx3.14(6.4xx10^6)^2m^2`
`A = 5.14xx10^(14)m^2`
As 5.14 gt 5, therefore order of magnitude of surface area = 15
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Knowledge Check

  • The order of magnitude of 379 is

    A
    `1`
    B
    `2`
    C
    `3`
    D
    `4`

  • The total surface area of earth is

    A
    510 million sq. km.
    B
    610 million sq. km
    C
    710 million sq. km
    D
    810 million sq. km

  • The order of magnitude of 0.00701 is

    A
    `-2`
    B
    `-1`
    C
    `2`
    D
    `1`

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    The magnitude of the volume of a closed right circular cylinder of unit height divided by the magnitude of the total surface area of the cylinder (r being the radius of the cylinder) is equal to

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