Smile 發問於 科學及數學數學 · 2 月前

Maths problem: how to do, thanks?

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1 個解答

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  • SC147
    Lv 6
    2 月前
    最愛解答

    (a) least possible wt. of a regular pack of powder 

    = 80-0.5 = 79.5 g

    (b) 

    least possible wt. of this pack of powder

    = 79.5 g x 45 = 3577.5 g = 3.5775 kg = 3.6 kg (corr. to the nearest 0.1 kg) 

    max. possible wt. of this pack of powder

    = 80.5 g x 45 = 3622.5 g = 3.6225 kg = 3.6 kg (corr. to the nearest 0.1 kg) 

    So, this pack of powder, 

    which has a possible wt. in between 3.5775 & 3.6225 kg, 

    can only be measured as 3.6 kg(corr. to the nearest 0.1 kg).

    ∴ it is not possible that the total wt. of this pack of powder to be measured as

    3.5 kg, corr. to the nearest 0.1 kg

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