A man on tour travels first 100 km at 64 km/hr and the next 100 km at 80 km/hr. Find the average speed for first 200 km of tour.
Choose the correct choice from the following answers:
A) 50.11 km/hr
B) 51.11 km/hr
C) 52.11 km/hr
D) 58.00 km/hr
E) None of these
Explanation:   We know Time = 58.00 km/hristance/speed   So total time taken =   (100/60+100/80)=35/12hours   Time taken for 200 Km = 200∗35/12=58.00km/hr   Option 58.00 km/hr
<result>D</result>
A man on tour travels first 100 km at 64 km/hr and the next 100 km at 80 km/hr. Find the average speed for first 200 km of tour.