The speed of a car is 90 km in the first hour and 30 km in the second hour. What is the average speed of the car?	Choose one
A) 50 kmph	B) 60 kmph	C) 75 kmph	D) 85 kmph	E) 90 kmph
Explanation:   S = (90 + 30)/2= 
<gadget id="calculator">(90 + 30)/2</gadget>
<output>60</output>
60 kmph   60 kmph)
<result>B</result>
The speed of a car is 90 km in the first hour and 30 km in the second hour. What is the average speed of the car?