• # question_answer 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 320 km of the tour is? A) 35.55 km/hr                  B) 36 km/hrC) 71.11 km/hr                  D) 71 km/hr

Total time taken $=2.5+2$ $=4.5\,\,hours$ Now, the required average speed $=\frac{320}{4.5}$ $=71.11\,\,km/hr$