A man travels 100km 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) 45km/hr C) 48.9km/hr D) 52.6km/hr E) 27.6km/hr
Total distance traveled = 100+200+300+100 = 600km   Total time taken = 100/50 + 200/20 + 300/100 + 100/50= 
<gadget id="calculator">100/50 + 200/20 + 300/100 + 100/50</gadget>
<output>17</output>
17 hrs   35.3km/hrverage speed= 600/17 = 35.3km/hr approximately ;   35.3km/hrnswer is 35.3km/hr
<result>A</result>
A man travels 100km 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?