The area of the rectangle is 42 square feet. Find the length of the rectangle.

Question

rectangle is drawn so what is the width is 1 feet shorter than the length.area of the rectangle is 42 square feet. Find the length of the rectangle.

Answer 1

Hi Ali,

 

If the length = X then the width is X -1

 

Area = length x width = 42

 

So 42 = X(X - 1)

 

42 = X^2 - X

 

X^2 - X - 42 = 0

 

(X - 7) (X + 6) = 0

 

The length can't be negative, so X = 7

 

Then the width = 6

 

Dan