SOLUTION: The length of a rectangle is 3 times the width. The area is 108 cm^2. Find the dimensions of the rectangle.

Question 991004: The length of a rectangle is 3 times the width. The area is 108 cm^2. Find the dimensions of the rectangle.
Answer by ikleyn(52780) (Show Source): You can put this solution on YOUR website!
.
Let x be the length in centimeters, and y be the width in centimeters.

You have two equations

.

Substitute the expression for x from the first equation to the second one. You will get

= ,

= = 36,

y = +/- 6.

Only positive value suits. Thus the width is 6 cm.

Hence, the length is 3*6 = 18 cm.

Check. 18*6 = 108 .

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