(3) The surface area of a sphere of diameter 21cm is __________ a : 616 2 cm b : 1386 2 cm r h 2 c : 1285 2 About the author Josie
Answer:
1386
Step-by-step explanation:
Answer:
r=21/2
surface anrea of a sphere =4πr²=4(3.14)(21)(21)/4=1384.74cm²