Question
A poster has an area of 432 square inches. The length , in inches, of the poster is 6 inches longer than the width of the poster. Which of the following equations can be solved to determine the length, in inches, of the poster?
Hint:
Hint:
We consider that the poster is a rectangle which has an area of 432 square inches. The area of a rectangle is given by length*breadth. In the question, we are given a relation between the length and the breadth of the rectangle. So we just need to use that and use it in the formula of finding the area to get an equation.
The correct answer is:
Given,
Area of the poster = 432 square inches
According to the question,
Length of the poster is 6 inches longer than the breadth. Writing this
statement in the mathematical form, we have
Breadth of the poster
The poster is in the shape of a rectangle.
We know,
Area of a rectangle = Length Breadth
Thus,
Area of the poster =
Rewriting the above equation, we have
Simplifying, we get
The solution of the above equation gives the value of x , which is the length of the poster.
Hence, the correct option is B)
Note:
The question can be further extended and ask us to find the length, breadth, or the perimeter of the poster. In that case, first we would solve the above equation to find the length of the poster and then use it to find the breadth. Finally we can find the perimeter easily by using the formula: perimeter (length + breadth).
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