(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
Answers
Answered by
0
Answer:
r=21/2
surface anrea of a sphere =4πr²=4(3.14)(21)(21)/4=1384.74cm²
Answered by
0
Answer:
1386
Step-by-step explanation:
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