Question

The radius of a sphere is3.5 cm.Find its surface area and volume​

Answer 1

Answer:

Radius of sphere = 3.5 cm

Volume of Sphere = \frac{4}{3} \pi r^{3}

3

4

πr

3

= \frac{4}{3} \times 3.14 \times (3.5)^{3}

3

4

×3.14×(3.5)

3

= 179.503 cm^3179.503cm

3

Surface area of sphere = 4\pi r^{2}4πr

2

= 4\times 3.14 \times (3.5)^{2}4×3.14×(3.5)

2

= 153.86 cm^2153.86cm

2

Hence the surface area of sphere is 153.86 cm^2153.86cm

2

and the Volume is 179.503 cm^3179.503cm

3

Answer 2

Radius of Sphere = 3.5 cm

SURFACE AREA = 4πr²

= 4 x 22/7 x 3.5 x 3.5

= 88/7 x 3.5 x 3.5

= 154 cm²

VOLUME = 4/3 π r³

= 4/3 x 22/7 x (3.5)³

= 88/21 x 42.8

= 201.98 cm³