Question

find the surface area of a sphere of diameter 3.5​

Answer 1

Answer: 38.48451

Step-by-step explanation:

Answer 2

$tsa \: ofsphere = 4\pi {r }^{2} \\ \: \: \: \: 4 \times 22 \div 7 \times 35 \div 20 \times 35 \div 20 \\ 11 \times 7 \div 2 \\ = 38.5 {cm}^{2}$