an error 38 % 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 = ( 38 + 38 + ( 38 ã — 38 ) / 100 ) % = 90.44 % answer : e"
divide(multiply(subtract(square_area(add(const_100, 38)), square_area(const_100)), const_100), square_area(const_100))