Question

find the surface area of a sphere having diameter 30 cm​

Answer 1

Step-by-step explanation:

Here given that the diameter of the sphere is 30 cm

Let the radius be r cm

hence radius = diameter/ 2 = 15cm

We know that, surface area of the sphere =4πr²

$= 4 \times \frac{22}{7} \times (15) ^{2}$

=2828. 57cm²

hope it helps

itzpappu here

Answer 2

Answer:

2826 cm^2

Step-by-step explanation:

A=4πr2

d=2r

Solving forA

A= 4 × 3.14 × 15 × 15. i.e. d = r/2

A = 2826 cm2