SOLUTION: A paint roller has a diameter of 4 inches and a height of 10 inches. How many square feet would I cover after 3 revolutions? This question is asking me to find what?

Question 509394: A paint roller has a diameter of 4 inches and a height of 10 inches. How many square feet would I cover after 3 revolutions? This question is asking me to find what?
Found 2 solutions by solver91311, jerryguo41:
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

They want you to calculate 3 times the lateral surface area of the roller.

Then convert from square inches to square feet (divide by 144)

John

My calculator said it, I believe it, that settles it

Answer by jerryguo41(197) (Show Source): You can put this solution on YOUR website!
This question is asking you to find the lateral area of the shape.
For a cylinder,use:

r= radius
h=height
1)Plug all numbers in

2) Simplify

3) Multiply by three (Three revolutions)

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