The speed of a car is 90 km in the first hour and 42 km in the second hour. What is the average speed of the car? Select
A) 89 kmph  B) 92 kmph  C) 75 kmph  D) 65 kmph  E) 66 kmph
S = (90 + 42)/2= 
<gadget id="calculator">(90 + 42)/2</gadget>
<output>66</output>
66 kmph   66 kmph
<result>E</result>
The speed of a car is 90 km in the first hour and 42 km in the second hour. What is the average speed of the car?