In the first hour of a two-hour trip, a car traveled d kilometers, and in the second hour of the trip, the car traveled one third that distance. What is the average rate at which the car traveled during the trip, in kilometers per hour?	Select.
A) d
B) 1/3*d
C) 1/2*d
D) 3/4*d
E) 2/3*d
Solution:   Lets look at the information given in the question...   Total time travelled = 2 hrs   Distance travelled first hour = d   Distance travelled second hour = d/3   The question is asking for the avg speed at which the car travels for 2 hrs   We know that avg speed = total distance/total time   Lets place the information given in the question to the formula above = (d+d/3)/2   = 4/6*d= 2/3 * d   We find that option E is the answer as it gives the same expression as found in our calculation above. Answer option 2/3*d.
<result>E</result>
In the first hour of a two-hour trip, a car traveled d kilometers, and in the second hour of the trip, the car traveled one third that distance. What is the average rate at which the car traveled during the trip, in kilometers per hour?