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? Choose the correct choice from the following choices
A) 48 km/hr
B) 40 km/hr
C) 44 km/hr
D) 38 km/hr
E) 52 km/hr
A   48 km/hr   Speed on return trip = 150% of 40 = 60 km/hr.   48 km/hrverage speed = (2 * 40 * 60)/(40 + 60)= 
<gadget id="calculator">(2 * 40 * 60)/(40 + 60)</gadget>
<output>48</output>
48 km/hr.
<result>A</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?