 
 <translate> D = 100 + 150 = 250 m
S = 50 * 5/18 = 125/9
T = 250 * 9/125 = 18 sec
The final answer: (A). <ibo> D = 100 + 150 = 250 m S = 50 * 5/18 = 125/9 T = 250 * 9/125 = 18 sec Azịza ya bụ: (A). 