Question

18.
The Earth is approximately a sphere of diameter 12742 km
The surface area of a sphere is given by the formulaA=4pie rpower2
The surface approximat
Calculate the surface area of the Earth.
Give your answer in metres and in standard form.​

Answer 1

First find out the radius of earth.

so, radius :

$\frac{12742}{2 } = 6371km$

Surface area =

$4 \times \frac{22}{7} \times 6371 \times 6371 \\ = 510269772.57142$

= 510269772.6 km.

= 510269772571.42 m

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