A student traveled 25 percent of the distance of the trip alone, continued another 40 miles with a friend, and then finished the last half of the trip alone. How many miles long was the trip?	Options
A) 120
B) 140
C) 160
D) 180
E) 200
Let x be the total length of the trip.   0.25x + 40 miles + 0.5x = x   40 miles = 0.25x   x = 160 miles   The answer is 160.
<result>C</result>
A student traveled 25 percent of the distance of the trip alone, continued another 40 miles with a friend, and then finished the last half of the trip alone. How many miles long was the trip?