Question

4 cm, Find the surface areas and volumes of spheres of the given radii. ( = 3.14)

Answer 1

Given ,
radii(r)= 4cm
We know that,
A sphere with radius r has a volume of (4/3)πr³  and a surface area of 4πr²,
Hence,

Surface area of sphere is= 4πr²
= 4×3.14× (4²)

= 12.56× 16

= 200.96cm²

Volume of sphere is= (4/3)πr³
= (4/3)×3.14× (4³)

= (12.56/3)× 64

= 267.904 cm³

Answer 2

Solution :

Given radius of the Sphere(r)=4cm

i ) Surface area of the sphere

= 4πr²

= 4 × 3.14 × 4²

= 200.96 cm²

ii ) Volume of the Sphere = V

V = ( 4/3 )πr³

= ( 4/3 ) × 3.14 × 4³

= ( 4/3 ) × 3.14 × 64

= 267.946 cm³

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