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 380 km of the tour is:	Select.
A) 31.11 km/hr	B) 35.55 km/hr	C) 71.11 km/hr	D) 84.44 km/hr	E) 71 km/hr
Total time taken = 160/64 + 160/80 = 9/2 hours   --&gt; Average speed = 380 x 2/9 = 84.44 km/hr.   Answer : 84.44 km/hr.
<result>D</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 380 km of the tour is: