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]

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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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