Question

find the surface area of a sphere is 154 cm^2 find its rad
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Answer 1

Answer:

Let x be radius

⇒Surface Area =154cm

2

∴4πx

2

=154

⇒x

2

=

4×22

154×7

=

4

49

⇒x=

4

49

x=3.5cm

Answer 2

Radius is 3.5 cm

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