The roof of an apartment building is rectangular and its length is 3 times longer than its width. If the area of the roof is 588 feet squared, what is the difference between the length and the width of the roof?
Options:
A) 28.  B) 40.  C) 42.  D) 44.  E) 46.
Answer is A: 28   Let w be the width , so length is 3w. Therefore : w*3w = 588, solving for, w = 14 , so 3w-w = 2w = 2*14= 
<gadget id="calculator">2*14</gadget>
<output>28</output>
28
<result>A</result>
The roof of an apartment building is rectangular and its length is 3 times longer than its width. If the area of the roof is 588 feet squared, what is the difference between the length and the width of the roof?