A man on tour travels first 160 km at 64 km/hr and the next 160 km at 80 km/hr. Find the average
speed for first 320 km of tour.
Choose the correct choice from the following answers.
A) 70.11 km/hr B) 71.11 km/hr C) 72.11 km/hr D) 73.11 km/hr E) None of these
Explanation:   We know Time = Distance/speed   So total time taken =   (16064+16080)=92hours Time taken for 320 Km = 320   ∗   29=71.11km/hr   Answer: 71.11 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. Find the average
speed for first 320 km of tour.