Adom's 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?A71.11km/hrB68km/hrC73.4km/hrD65km/hrAnswer: A. 71.11km/hr Read Explanation: X=64 y=80 Average speed 2xy/(x+y)= (2x61x80)/ (64+80) = (2 × 64 × 80)/144 =71.11 km/hrRead more in App