The width of a rectangular hall is ½ of its length. If the area of the hall is 578 sq.m, what is the difference between its length and breadth?	Pick one:
A) 8m
B) 10m
C) 12m
D) 15m
E) 17m
Let the length of the hall be x m   Breadth of the hall = 1x/2 m   Area of the hall = Length * Breadth   578 = x * 1x/2   x² = 1156   x =34   Difference between the length and breadth of the hall = x - 1x/2 = x/2   =34/2= 
<gadget id="calculator">34/2</gadget>
<output>17</output>
17m   ANSW17mR:17m
<result>E</result>
The width of a rectangular hall is ½ of its length. If the area of the hall is 578 sq.m, what is the difference between its length and breadth?