The speed of a car is 120 km in the first hour and 60 km in the second hour. What is the average speed of the car? Pick one:	A) 89 kmph	B) 92 kmph	C) 90 kmph	D) 65 kmph	E) 77 kmph
S = (120 + 60)/2= 
<gadget id="calculator">(120 + 60)/2</gadget>
<output>90</output>
90 kmph   90 kmph
<result>C</result>
The speed of a car is 120 km in the first hour and 60 km in the second hour. What is the average speed of the car?