Determining the area of a rectangle is simply multiplying its length by its width.
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First, determine the area of a football field. Remember that the end zones are part of the area. Second, determine the area of a stamp. Third, make sure your units are the same. You will have to convert from square yards to square inches or from square inches to square yards. Last, divide the area of the football field by the area of the stamp. The result is the number of stamps required to cover the field. The area of any rectangle is the product of its length and width: A = l x w. There are 144 square inches per square foot, and nine square feet per square yard.
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With constant number of windings and current, the magnetic field density of a solenoid remains constant. However, magnetic flux is determined by the flow of magnetic field force through a given area. Therefore, the area is linearly and directly proportional to the magnetic flux.
The field's area is 40 hectares.
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