# 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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2. 👎 0
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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2. 👎 0

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