While calculating the edge of a square, a worker makes an error of 2% in excess. What % error does he make in calculating area? (%)
Choose the correct choice from the following options
A) 4.09 B) 4.0 C) 4.04 D) 4.02 E) 4.01

Rationale: explanation : given error = 2 % while measuring the side of a square . if the correct value of the side of square is 100 , the measured value : = > 100 + 2 % * 100 = 100 + 2 = 102 the area of square with edge 100 = side * side = > 100 * 100 = > 10000 the area of square with side 102 = 102 * 102 = 10404 error in area calculation = 10404 - 1000 = 404 % error = ( 404 / 10000 ) * 100 = 4.04 % answer : c
Answer: C