The speed of a car is 90 km in the first hour and 40 km in the second hour. What is the average speed of the car?	Choose the correct answer
A) 12 B) 75 C) 88 D) 65 E) 15
S = (90 + 40)/2= 
<gadget id="calculator">(90 + 40)/2</gadget>
<output>65</output>
65 kmph   Answer: 65
<result>D</result>
The speed of a car is 90 km in the first hour and 40 km in the second hour. What is the average speed of the car?