A man on tour travels first 150 km at 50 km/hr and the next 160 km at 80 km/hr. Find the average speed for first 310 km of tour. Pick one.
A) 60.11 km/hr	B) 61.01 km/hr	C) 62.00 km/hr	D) 63.11 km/hr	E) None of these
Explanation:   We know Time = Distance/speed   So total time taken =   (150/50+160/80)= 
<gadget id="calculator">(150/50+160/80)</gadget>
<output>5</output>
5hours   Time taken for 310 Km= 310/5= 
<gadget id="calculator">310/5</gadget>
<output>62</output>
62.00km/hr   Option 62.00 km/hr
<result>C</result>
A man on tour travels first 150 km at 50 km/hr and the next 160 km at 80 km/hr. Find the average speed for first 310 km of tour.