Surface = 2 x PI x r x H + 2 x PI x r^2
= 2 x r x h + 2 x r^2
= 2 x 6 x 12 + 2 x 6^2
= 144 + 72
= 216 PI in^2
Answer is A
The answer would be 4 1/4 (4.25)
10-1.5=8.5/2=4.25
Hope this helps!
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Therefore, 20/21 is the answer.