Question

What is the surface area of the sphere below?
5
2.5
A. 1257 units2
B. 1007 units2
C. 12573 units2
O
D. cannot be determined

Answer 1

Answer:

100 pi units 2 ..............

Answer 2

Here's the solution :

In a sphere,

$\boxed{ \mathsf{surface \: \: area = 4\pi {r}^{2} }}$

now, let's solve :

• $s = 4 \times \pi \times 5 \times 5$
• $s = 100\pi$

hence, correct answer is B. 100π unit²