The speed of a car is 90 km in the first hour and 60 km in the second hour. What is the average speed of the car? Options:	A) 89 kmph	B) 92 kmph	C) 75 kmph	D) 65 kmph	E) 77 kmph
75 kmph   75 kmph   S = (90 + 60)/2= 
<gadget id="calculator">(90 + 60)/2</gadget>
<output>75</output>
75 kmph
<result>C</result>
The speed of a car is 90 km in the first hour and 60 km in the second hour. What is the average speed of the car?