A person travels from P to Q a speed of 40 km/hr and returns by increasing his speed by 50%. What is his average speed for both the trips?	Choices:
A) 37  B) 26  C) 48  D) 21  E) 92
Speed on return trip = 150% of 40 = 60 km/hr.   Average speed = (2 * 40 * 60)/(40 + 60)= 
<gadget id="calculator">(2 * 40 * 60)/(40 + 60)</gadget>
<output>48</output>
48 km/hr.   Answer:48
<result>C</result>
A person travels from P to Q a speed of 40 km/hr and returns by increasing his speed by 50%. What is his average speed for both the trips?