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17 August, 14:30

If a marble rotates 180 degrees in 9 seconds, how many does it rotate in 18 seconds.

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Answers (2)
  1. 17 August, 14:55
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    Since 9*2=18 all you have to do is the same to 180 ...

    180*2=360

    Answer: The marble rotates 360 degrees in 18 seconds
  2. 17 August, 15:18
    0
    It would rotate 360 degrees because 18 seconds is twice the amount of 9 seconds, so you need to multiply 180 by 2, which is 360, or one full rotation.
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