The length of equator of the globe is 44 cm. Find its surface area​

The length of equator of the globe is 44 cm. Find its surface area​

2 thoughts on “The length of equator of the globe is 44 cm. Find its surface area​”

  1. Given:

    The length of equator of a globe 44 cm

    Find:

    It’s area

    Solution:

    The length of equator of a globe is the circumference of the globe.

    Circumference=44 cm

    So, The circumference of a circle=[tex]\orange{2 \ pi \ r}[/tex]

    We know that value of pi is 22/7 or 3.14Here We will use 22/7

    44=2×22/7×r

    r=44×7/2×22

    Therefore r=7 cm

    Hence the radius of globe is 7 cm

    Now we will find total surface area

    Surface area=[tex]\pink{4 \ pi\ r^2}[/tex]

    Surface area=[tex]\blue{4×22/7×7×7}[/tex]

    Surface area=[tex]\green{616 cm^2}[/tex]

    Therefore the surface area is [tex]\bold{616 \ cm^2}[/tex]

  2. Answer:

    Length of the equator of the globe or circumference of a globe =44cm

    Let radius r=x

    Circumference of the globe =2πr

    ∴44=2×

    7

    22

    ×x

    ⇒x=

    44

    44×7

    =7cm

    Then Surface area of the globe = 4πr

    2

    =4×

    7

    22

    ×(7)

    2

    =616cm

    2

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