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Question

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

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Solution

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

Let radius r=x

Circumference of the globe =2πr

44=2×227×x

x=44×744=7cm

Then Surface area of the globe = 4πr2=4×227×(7)2=616cm2

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