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Byju's Answer
Standard IX
Mathematics
Surface area of a sphere
The radius of...
Question
The radius of a sphere is 2.1cm. Find its surface area.
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Solution
We all know that Surface Area of a Sphere is given by
4
π
r
2
S
A
=
4
π
r
2
S
A
=
4
×
22
7
×
(
2.1
)
2
S
A
=
55.44
cm
2
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