Determine the spacing to the first and second inlets that will drain a section of highway pavement if the runoff coefficient is 0. 9 and the design rainfall is 15 cm/h. The pavement width is 10 m (S_X = 0. 02, S_L = 0. 02, and n = 0. 016), the efficiency of inlet is 0. 35, and the allowable spread is 2 m.