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Answer in book is different to what I calculated (inequalities) watch

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    Attachment 729038Howdy .

    I am trying to solve the above question and I got 6.25 kg. However, the answer states 3.25 kg. Have I done something wrong?
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    I agree with you.
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    I also got 6.25kg
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    3.25kg doesn't work as an answer. Textbooks makes mistakes
 
 
 
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Updated: March 4, 2018
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