A man travels 100km by train at 35km/hr, 200km by ship at 20km/hr, 300km by aeroplane at 100km/hr and 100km by car at 50km/hr. What is the average speed for the entire distance?  Choose the correct choice from the following options:
A) 39.2km/hr
B) 45km/hr
C) 48.9km/hr
D) 52.6km/hr
E) 27.6km/hr
Total distance traveled = 100+200+300+100= 
<gadget id="calculator">100+200+300+100</gadget>
<output>700</output>
700km   Total time taken= 100/35 + 200/20 + 300/100 + 100/50 = 17.85 hrs   39.2km/hrverage speed = 700/17.85 = 39.2km/hr approximately ;   39.2km/hrnswer is 39.2km/hr
<result>A</result>
A man travels 100km by train at 35km/hr, 200km by ship at 20km/hr, 300km by aeroplane at 100km/hr and 100km by car at 50km/hr. What is the average speed for the entire distance?