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Mathematics
A car travels first 160 km at 64 km/hr and the next 160 km at 80 km/hr. What is the average speed for the first 320 km of the tour?
A
70.24 km/hr
Option A
B
74. 24 km/hr
Option B
71.11 km/hr
Correct answer
D
72.21 km/hr
Option D
Correct answer: C
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