A person travels from K to L a speed of 50 km/hr and returns by increasing his speed by 50%. What is his average speed for both the trips ?
Pick one.
A) 50 kmph  B) 70 kmph  C) 60 kmph  D) 80 kmph  E) 10 kmph
Explanation:   Speed on return trip = 150% of 50 = 75 km/hr.   Average speed = (2 x 50 x 75)/(50 + 75) = 60 km/hr.   Answer: 60 kmph
<result>C</result>
A person travels from K to L a speed of 50 km/hr and returns by increasing his speed by 50%. What is his average speed for both the trips ?