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Math Help - diameter problem.

  1. #1
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    Exclamation diameter problem.

    Please help.....
    An electromagnet is being made by wrappinga wure around an iron bolt. The wire is 0.1 inch in diameter so each wrap is 0.1 inch wide. One wrap is amde every 3 seconds. To the nearest tenth of a second, how many seconds will it take to wrap the 5-inch bolt?

    Thanks in advance!
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by alyaly View Post
    Please help.....
    An electromagnet is being made by wrappinga wure around an iron bolt. The wire is 0.1 inch in diameter so each wrap is 0.1 inch wide. One wrap is amde every 3 seconds. To the nearest tenth of a second, how many seconds will it take to wrap the 5-inch bolt?

    Thanks in advance!
    A 5" bolt will require 50 wrappings, so time is approximatly 50*3 seconds.

    RonL
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  3. #3
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    Quote Originally Posted by CaptainBlack View Post
    A 5" bolt will require 50 wrappings, so time is approximatly 50*3 seconds.

    RonL

    can you please explain how you came up with 50?
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  4. #4
    Grand Panjandrum
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    Quote Originally Posted by alyaly View Post
    can you please explain how you came up with 50?
    Each wrapping is 1/10 of an inch so there are 10 to the inch, hence 50 in five inches

    RonL
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