The roof of an apartment building is rectangular and its length is 4 times longer than its width. If the area of the roof is 784 feet squared, what is the difference between the length and the width of the roof?
Choose the correct choice from the following choices:	A) 38.	B) 40.	C) 42.	D) 44.	E) 46.
Let the width= x   x*4x=784   x^2= 196   x= 14   Length= 4*14= 
<gadget id="calculator">4*14</gadget>
<output>56</output>
56   difference= 56-14= 
<gadget id="calculator">56-14</gadget>
<output>42</output>
42   42. is the answer
<result>C</result>
The roof of an apartment building is rectangular and its length is 4 times longer than its width. If the area of the roof is 784 feet squared, what is the difference between the length and the width of the roof?