math

a rectangular field 400 m long has an area of 6 hectares. calculate the perimeter

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  1. a hectare is 10,000 m^2, so
    the width is (6*10000)/400 = _______ m
    the perimeter is, as always, 2*(length+width)

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    oobleck
  2. 1 hectare= 10,000m^2
    if one hectare is that amount so 6 hectares=
    (you do cross multiplication)

    1 hectare= 10,000
    6 hectares= x

    60000=x
    x here is the total area

    now we know that the length of the rectangle is 400 so we will construct an equation to find width so we say:

    400(length)*w(width)=60,000(total area)

    divide by 400 on both sides

    w=150

    then we find p(perimeter)
    we say 150*2+400*2
    which equals to=1100

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  3. 1 hectare= 10,000m^2
    if one hectare is that amount so 6 hectares=
    (you do cross multiplication)

    1 hectare= 10,000
    6 hectares= x
    60000=x
    x here is the total area
    now we know that the length of the rectangle is 400 so we will construct an equation to find width so we say:
    400(length)*w(width)=60,000(total area)
    divide by 400 on both sides
    w=150
    then we find p(perimeter)
    we say 150*2+400*2
    which equals to=1100

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