Public class mysquare extends griditem { private int side; public mysquare(int xvalue, int yvalue, int s) { x = xvalue; y = yvalue; side = s; } public double getarea() { return side * side; } public boolean containspoint(int xvalue, int yvalue) { return xvalue > = x & & xvalue < = x + side & & yvalue > = y & & yvalue < = y + side; } } required put a system. out. println statement into each containspoint method (griditem, mycircle, and myrectangle). run the program and examine the output. you will notice that griditem’s containspoint method is never called. why is this? a3.

Along 8-cm diameter steam pipe whose external surface temperature is 900c connects two buildings. the pipe is exposed to ambient air at 70c with a wind speed of 50 km/hr blowing across the pipe. determine the heat loss from the pipe per unit length. (b) air at 500c enters a section of a rectangular duct (15 cm x 20 cm) at an average velocity of 7 m/s. if the walls of the duct are maintained at 100c. a) the length of the tube for an exit temperature of the air to be 40 0c. b)the rate of heat transfer from the air. c) the fan power needed to overcome the pressure drop in this section of the duct.