SOLUTION: A steel roller is 4ft. long and 30 in. in diameter. what area will it cover in rolling through 250 revolutions?

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Question 1033147: A steel roller is 4ft. long and 30 in. in diameter. what area will it cover in rolling through 250 revolutions?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
One revolution would move through the length of the circumference of the roll.
So that area would be,
A=2pi%2AR%2AL
A=2pi%2A%2830%2F2%29%2A%2848%29
A=1440pi}
So then 250 revolutions would be,
A%5Bf%5D=250%281440pi%29
A%5Bf%5D=36000piin%5E2