Question

HELP PLEASE

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?

Answer 1

Answer:that’s wrong

Explanation:

Answer 2

`A = 127.17` square inch

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
`A=2\pi rh+2\pi r^2\\`

Substituting the given values in above equation, we get -

`A = (2*3.14*1.5*12) + (2 * 3.14*1.5^2)\\A = 113.04 + 14.13\\A = 127.17`

`A = 127.17` square inch