an error 12 % in excess is made while measuring the side of a square . now what is the percentage of error in the calculated area of the square ?
"percentage error in calculated area = ( 12 + 12 + ( 12 ã — 12 ) / 100 ) % = 25.44 % answer : d"
divide(multiply(subtract(square_area(add(const_100, 12)), square_area(const_100)), const_100), square_area(const_100))