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26 August, 15:19

A spool of thread contains 150 revolutions of thread. the diameter of the spool is 3 centimeters. find the length of the thread

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  1. 26 August, 16:38
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    The circumference is given by:

    C = 2 * pi * r

    Where,

    r: radio

    Substituting we have:

    C = 2 * (3.14) * (3/2)

    C = 9.42 cm

    Then, the length is given by the product of the circumference and the number of revolutions.

    We have then:

    L = (150) * (9.42)

    L = 1413 cm

    Answer:

    the length of the thread is:

    L = 1413 cm
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