Question

The surface area of a sphere can be approximated as follows: Surface area = 4πr2; where r is the radius of the sphere; π is a constant that is roughly equal to 3. Calculate the surface area of a sphere with a radius of 7 meters using the simple approximation above.

Answer 1

588
`m^2`

Step-by-step explanation:

From the illustration, the surface area is given by the formula:

Surface area = 4πr2, where r is radius and π is a constant with a value of 3.

Then, if for a sphere, r = 7 m, the surface area becomes:

Surface area = 4 x 3 x 7 x 7 = 588
`m^2`

The surface area of a sphere with a radius of 7 meters is therefore 588
`m^2`