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”

### Leave a Comment

You must be logged in to post a comment.

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

You must be logged in to post a comment.

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=44cmSo, The circumference of a circle=[tex]\orange{2 \ pi \ r}[/tex]

Weknowthatvalueofpiis22/7or3.14HereWewilluse22/744=2×22/7×r

r=44×7/2×22

Therefore r=7 cm

Hencetheradiusofglobeis7cmNowwewillfindtotalsurfaceareaSurface 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]

ThereforethesurfaceareaisAnswer: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