Answer:
b. 200/x
Step-by-step explanation:
Hi, to answer this question we have to analyze the information given:
First half speed= x
Second half speed= 1.5 x (1.5 times faster on the second 120 miles of his trip)
Since:
Time = distance /speed
Total time = 1st half time + 2nd half time
Replacing with the values given
Total time =120/ x + 120/1.5x
Total time = 180/ 1.5x + 120 /1.5x
Total time = 180+120/1.5x
Total time = 300/1.5x = 200/x
Feel free to ask for more if needed or if you did not understand something.