Question

find the surface area of a sphere of diameter . (i) 3.5 m ​

Answer 1

Answer:

surface area of sphere = 4 πr^2

Diameter = d = 3.5

so,

Radius = r = d/2 = 3.5/2

substituting

area = 4 . 22/7.(3.5/2)^2

= 4(22/7)(3.5/2)(3.5/2)

= 22*0.5*3.5

= 38.5 cm^2

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Answer 2

Answer:

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