Question

.The radius of a sphere is 3r then find its surface area.​

Answer 1

Answer:

The surface area of a sphere of radius x is given by 4πx2. Here, the radius is specified as 3r. Substituting this into the formula, we get the surface area as (4π) × (3r)2.

Answer 2

Answer:

36πr^2

Explanation:

surface area of sphere is = 4πR^2

here radius R = 3r

surface area = 4π(3r)^2

= 4*9*π*r^2

= 36πr^2