Question 955610
How many square inches of metal are needed to make a soup can that is 2 2/3 in. in diameter and 4 in. high? The answer is (128 pi)/9 in. I'm not sure how to get to that answer.
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diameter=2 2/3 in=8/3 in
radius=8/6=4/3 in
area of 2 ends=2*πr^2=2*π(4/3)^2=2π(16/9)=32π/9
area between ends=2πr*height=2π(4/3)*4=32π/3=96π/9
Total area=32π/9+96π/9=128π/9 
How many square inches of metal are needed to make the soup can? 128π/9