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24 August, 15:12

ABC is a straight line. The length of AB is four times the length of BC. AC=75

Work out the length of AB

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Answers (1)
  1. 24 August, 18:10
    0
    AB = 60

    Step-by-step explanation:

    Given AC = 75 and AB = 4BC, then

    AB + BC = AC, that is

    4BC + BC = 75

    5BC = 75 (divide both sides by 5)

    BC = 15

    Thus

    AB = 4BC = 4 * 15 = 60
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