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Find the Surface Area of a Sphere of Diameter 3.5 m - Mathematics

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Find the surface area of a sphere of diameter 3.5 m

`["Assume "pi=22/7]`

 

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Solution

`"Radius (r) of sphere "="Diameter"/2=3.5/2=1.75m`

Surface area of sphere = 4πr2

`=[4xx22/7xx(1.75)^2]m^2`

= 38.5 m2

Therefore, the surface area of the sphere having diameter 3.5 m is 38.5 m2.

Concept: Surface Area of a Sphere
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APPEARS IN

NCERT Class 9 Maths
Chapter 13 Surface Area and Volumes
Exercise 13.4 | Q 2.3 | Page 225

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