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22 August, 05:32

Water makes about 3/4 of a person's weight.

1. If a student weighs 86 lbs., how much of his weight is water?

2. If a student weighs 70 lbs., how much of his weigh is water?

3. If water makes 30 lbs. of a student's weigh, how much does this student weigh?

4. If water makes 45 lbs. of a student's weigh, how much does this student weigh?

5. If water makes 60 lbs. of a student's weigh, how much does this student weigh?

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Answers (1)
  1. 22 August, 06:00
    0
    1. 64.5 lbs

    2. 52.5 lbs

    3. 40lbs

    4. 60 lbs

    5. 80 lbs

    Step-by-step explanation:

    To determine how much of a persons weight is water, multiply 3/4 by their weight.

    1. weight of water = weight * 3/4

    = 86 * 3/4

    = 64.5 lbs

    2. weight of water = weight * 3/4

    = 70 * 3/4

    = 52.5 lbs

    3. weight of water = weight * 3/4

    30 = weight * 3/4

    Multiply by 4/3 on each side

    30*4/3 = weight * 3/4*4/3

    40 = weight

    4. weight of water = weight * 3/4

    45 = weight * 3/4

    Multiply by 4/3 on each side

    45*4/3 = weight * 3/4*4/3

    60 = weight

    5. weight of water = weight * 3/4

    60 = weight * 3/4

    Multiply by 4/3 on each side

    60*4/3 = weight * 3/4*4/3

    80 = weight
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