The surface area of sphere when its diameter is 4 cm is *
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1
Answer:
A≈50.27
Step-by-step explanation:
The Greek mathematician Archimedes discovered that the surface area of a sphere is the same as the lateral surface area of a cylinder having the same radius as the sphere and a height the length of the diameter of the sphere.
The lateral surface area of the cylinder is 2πrh where h=2r .
Lateral Surface Area of the Cylinder =2πr(2r)=4πr2 .
Therefore, the Surface Area of a Sphere with radius r equals 4πr2 .
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Step-by-step explanation:
diameter=4cm
radius =2cm
surface area of sphere=4πr2
=4πr2
=4*22/7*2*2
=352/7
=50.27cm2
hope this helped!!
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