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31 March, 02:47

Which of the following was not a an important invention created at the turn of the 20th century

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  1. 31 March, 05:28
    0
    the cotton gin

    Explanation:

    apex
  2. 31 March, 06:29
    0
    Answer: radio

    Explanation:Radio was not an important invention in the early 20th century. Instead it was developed by Heinrich Hertz in the 18th century. The cotton gin (APEX)
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