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) 27
B) 87
C) 48
D) 77
E) 51
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?