If the total distance of a journey is 120 km .If one goes by 60 kmph and comes back at 40kmph what is the average speed during the journey?
Pick:
A) 38km/hr
B) 58km/hr
C) 68km/hr
D) 48km/hr
E) 47km/hr
total distance=2*120   total time=120/60+120/40= 
<gadget id="calculator">120/60+120/40</gadget>
<output>5</output>
5 hours   avg=120*2/5= 
<gadget id="calculator">120*2/5</gadget>
<output>48</output>
48km/hr   ANSWER:48km/hr
<result>D</result>
If the total distance of a journey is 120 km .If one goes by 60 kmph and comes back at 40kmph what is the average speed during the journey?