Question

1. Find the surface area of a sphere of radius : 1) 10.5cm 2)5.6 3) 14cm​

Answer 1

Answer:

Step-by-step explanation:

Surface area of sphere=4πr² sq units.

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Solution:

Given:

(i)  Radius of the sphere (r) = 10.5 cm

Surface area of a sphere= 4πr²

= (4 × 22/7 × 10.5 × 10.5)

= 1386 cm²

 

ii)Given:Radius of the sphere (r) = 5.6 cm

Surface area of a sphere= 4πr²

= (4 × 22/7 × 5.6 × 5.6)

= 394.24cm²

 

 

(iii)Given: Radius of the sphere (r) = 14 cm

Surface area of a sphere= 4πr²

= (4 × 22/7 × 14 × 14)

= 2464 cm²

 

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Hope this will help you....