A man on tour travels first 160 km at 64 km/hr and the next 160 km at 80 km/hr. The average speed for the first 395 km of the tour is:  Choose the correct answer
A) 31.11 km/hr  B) 87.8 km/hr  C) 71.11 km/hr  D) 36 km/hr  E) 71 km/hr
Total time taken = 160/64 + 160/80 = 9/2 hours   --&gt; Average speed = 395 x 2/9 = 87.8 km/hr.   Answer : 87.8 km/hr.
<result>B</result>
A man on tour travels first 160 km at 64 km/hr and the next 160 km at 80 km/hr. The average speed for the first 395 km of the tour is: