an error 19 % 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 = ( 19 + 19 + ( 19 ã — 19 ) / 100 ) % = 41.61 % answer : b"
divide(multiply(subtract(square_area(add(const_100, 19)), square_area(const_100)), const_100), square_area(const_100))