A person travels from P to Q a speed of 60 km/hr and returns by increasing his speed by 50%. What is his average speed for both the trips?  Choose the most appropriate option:
A) 33 B) 75 C) 48 D) 99 E) 21
Speed on return trip = 150% of 60 = 90 km/hr.   Average speed of trip = 60 + 90 /2 = 150/2= 
<gadget id="calculator">150/2</gadget>
<output>75</output>
75 km/hr   Answer : 75
<result>B</result>
A person travels from P to Q a speed of 60 km/hr and returns by increasing his speed by 50%. What is his average speed for both the trips?