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March 26, 2017

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For small paving jobs, a contractor uses a roller pushed by a worker.

A roller pushed by a worker (radius=8 in; length=30 in.)

To the nearest square inch, what is the area of pavement with which the surface of the roller will come into contact in one complete rotation?


A 753 in.²
B 1,507 in.²
C 1,708 in.²
D 1,909 in.²

  • Math - ,

    length = circumference of roller = 2π(8) = 16π
    width = 30

    area = 30(16π) = 480π in^2

  • Math - ,

    =2(pi)rh
    =2(pi)(8)(30)
    =1507 in^2
    So the answer is B

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