Question

A rectangular field is 400 meters long and 300 meters wide area in square kilometers

Answer 1

Answer:

120 kilometers ($km^{2}$)

Step-by-step explanation:

first find the area in meters:

400*300 = 120000

now convert from meters to kilometers

1000 meters = 1 kilometer, therefore:

120000/1000

Simplify

120 kilometers ($km^{2}$)

Answer 2

=0.12km2

What does a rectangle look like?

A rectangle is the shape with parallel opposite sides, combined with all the 90 degree angles. As the type of the parallelogram, it has the opposite parallel sides. In the rectangle, 1 set of parallel sides is longer than the other, making it look like an elongated square

The rectangle field is 400 meters long and 300 meters wide. What is the area in square kilometers?

1km=1000m

Secondly the area of the rectangle is defined as the product of the width or the height:

A= w∗h

We could now approach the problem in 2 ways, we convert the sides of the rectangle to kilometers 1st and we convert the area from square meters to the square kilometers.

Convert sides:

Let w = width, h = height and A = area

w=300m=300/1000m=0.3km

h=400m=400/1000m=0.4km

A=0.3∗0.4km2=0.12km2

Convert area:

Let's first calculate the area in square meters:

Am=300∗400=120000m2

We know from above that 1km=1000m

That gives 1km2=1000∗1000m2=1000000m2

So Ak=Am/1000000=0.12km2

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