A tennis court is defined as having a length of 78', widths of 27' & 36' for a singles court and a doubles court respectively, a service box length of 21' and a net height 3' all the way across the court. The player serves striking the ball at a position vertically above the baseline and at a horizontal position 12' from the side line of the singles court to the opposite service area and is called in. The ball landing position is directly on the corner of the cross court service area line and the singles court sideline. Calculate the straight line distance from the ball strike position and landing position.