Question

A rectangular field is 450 meters long and 400 meters wide. What is the area of the field in square kilometers?

Do not round your answer. Be sure to include the correct unit in your answer.

Answer 1

Area of a Rectangle.
=length × width

Length = 450 m
Width = 400 m

      450 × 400 = 180000 m²

1 Km² = 1000000 m²
              180000 m²

180000/1000000 = 0.18 Km²

        Answer = 0.18 Km²

Answer 2

The rectangular field of the above mentioned dimensions will have an area of 0.18 km².

The question wants the area of the field in square kilometers yet the dimensions are given in meters.

The first step would be to change the dimensions to kilometers:

1 km = 1,000 meters

450 meters:                                                       400 meter:

= 450 / 1,000                                                     = 400 / 1,000

= 0.45 km                                                          = 0.40 km

The area is therefore:

= Length x Width

= 0.45 x 0.40

= 0.18 km²

In conclusion, the area of the rectangular field is 0.18km².

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