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A rolling pin is shaped like a cylinder with a diameter of 3 inches and a height of 12 inches. How many square inches of space does the rolling pin come in contact with after one complete roll?


Sagot :

Answer:

[tex]A = 127.17[/tex] square inch

Step-by-step explanation:

Square inches of space covered by rolling pin after one complete roll is equal to the outer surface area of cylinder.

As we know,

Surface area of Cylinder [tex]A=2\pi rh+2\pi r^2\\[/tex]

Substituting the given values in above equation, we get -

[tex]A = (2*3.14*1.5*12) + (2 * 3.14*1.5^2)\\A = 113.04 + 14.13\\A = 127.17[/tex]

[tex]A = 127.17[/tex] square inch

Answer:that’s wrong

Step-by-step explanation: