In measuring the sides of a rectangle, one side is taken 12% in excess and other 5% in deficit. Find the error percentage in the area calculated from these measurements.	Choose the correct option.
A) 3.5%  B) 6.4%  C) 3%  D) 5%  E) 2.6%
Say both sides of the rectangle are equal to 100 (so consider that we have a square). In this case the area is 100*100=10,000.   Now, the area obtained with wrong measurements would be 112*95=10,640, which is 6.4% greater than the actual area.   Answer: 6.4%.
<result>B</result>
In measuring the sides of a rectangle, one side is taken 12% in excess and other 5% in deficit. Find the error percentage in the area calculated from these measurements.