12.1.1 Calculate: (a) The missing value d(in mm) (b) The total length (in mm) of the exposed sides of the runway (3 (c) The area (in m²) of the runway that needs to be covered with carpet You may use the following formula: Area of a rectangle-length x width (4 (d) The length (in m) of the hall (3) 12.1.2 Harry, a British model, wants to know the measurement (in feet) of the front end of the runway. Convert 4,2 m to feet, rounded off to one decimal place. NOTE: 1 foot-0,3048 m (3)​