Question

Find the total surface area of a sphere having diameter 30 cm

Answer 1

your. ans here. dear. diameter 30

30/2

15

total surface area 15

Answer 2

answer is:

we know that,

the total surface area of sphere is equal to the lateral surface area of cylinder with the same radius and a height the length of the diameter of the sphere.

so,

let a cylinder of same radius and a height the length of the diameter of the sphere.

then,

lateral surface area of cylinder=2πrh

r=d/2

r=15cm,

h=d=30cm

lateral surface area of cylinder=2*22/7*15cm*30cm

=2828.57cm^

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