A man of height 1.5 m standing on top a building of height 48.5 m view another building of height 48.5 m views another building across the square. He observes that the angle of depression of the base of the building is 40° and the angle of depression of the top of the building is 25°. Both buildings stand on the same level ground. a) Calculate the distance of the man from the base of the building across the square measured along his line of sight.