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Find the surface area of a sphere of diameter 14 cm - CBSE Class 9 - Mathematics

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Question

Find the surface area of a sphere of diameter 14 cm

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

 

Solution

`"Radius (r) of sphere "= "Diamete"/2 = (14/2)cm = 7cm`

Surface area of sphere = 4πr2

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

= (88 x 7)cm^2

= 616cm^2

Therefore, the surface area of a sphere having diameter 14 cm is 616 cm2.

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APPEARS IN

 NCERT Solution for Mathematics Class 9 (2018 to Current)
Chapter 13: Surface Area and Volumes
Ex. 13.40 | Q: 2.1 | Page no. 225

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Solution Find the surface area of a sphere of diameter 14 cm Concept: Surface Area of a Sphere.
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