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?

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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) About Me  (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
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Answer by jerryguo41(197) About Me  (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:
2%28pi%29r%2Ah
r= radius
h=height
1)Plug all numbers in
2%28pi%292%2A10
2) Simplify
40%28pi%29
3) Multiply by three (Three revolutions)
120%28pi%29