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A rectangular container 45cm long and 25cm wide was full of water. After removing 22.5 liters of the water, the level of water became 4cm high. What was the height of the container?

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2 answers
  1. let the height be x cm
    original volume = (45)(25)x cm^3 = 1125x cm^3
    remember 1L = 1000 cm^3 (the beauty of the metric system)

    volume removed = (45)(25)(x-4)
    which is 22500
    1125(x-4) = 22500
    1125x - 4500 = 22500
    1125x = 27000
    x = 24

    the height was 24 cm

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