A person travels from P to Q a speed of 60 km/hr and returns by increasing his speed by 20%. What is his average speed for both the trips?
Choose the correct choice from the following.
A) 33 B) 77 C) 48 D) 66 E) 21
Speed on return trip = 120% of 60 = 72 km/hr.   Average speed of trip = 60 + 72 /2 = 132/2= 
<gadget id="calculator">132/2</gadget>
<output>66</output>
66 km/hr   Answer : 66
<result>D</result>
A person travels from P to Q a speed of 60 km/hr and returns by increasing his speed by 20%. What is his average speed for both the trips?