A man on tour travels first 160 km at 64 km/he and the next 160 km at 80 km/hr. The average speed for the first 320 km of the tour is?
Choose the correct choice from the following: A) 71.12 B) 71.19 C) 71.11 D) 71.132 E) 71.16
Total time taken = (160/64 + 160/8) = 9/2 hrs.   Average speed = 320 * 2/9 = 71.11 km/hr.   Answer:71.11
<result>C</result>
A man on tour travels first 160 km at 64 km/he and the next 160 km at 80 km/hr. The average speed for the first 320 km of the tour is?