A man travels 250km by train at 50km/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?
Pick one:
A) 35.3km/hr
B) 42.5km/hr
C) 48.9km/hr
D) 52.6km/hr
E) 27.6km/hr
Total distance traveled = 250+200+300+100= 
<gadget id="calculator">250+200+300+100</gadget>
<output>850</output>
850km   Total time taken= 250/50 + 200/20 + 300/100 + 100/50= 
<gadget id="calculator">250/50 + 200/20 + 300/100 + 100/50</gadget>
<output>20</output>
20 hrs   Average speed=850/20= 
<gadget id="calculator">850/20</gadget>
<output>85/2 = around 42.5</output>
42.5km/hr approximately ;   Answer is 42.5km/hr
<result>B</result>
A man travels 250km by train at 50km/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?