Answer:
7.5 hours (7 hours and 30 minutes)
Explanation:
ok Let's start with 64km/h.
1.6 km=1 mile,
64รท1.6=40miles
so 64km/h changes into 40miles/hour.
Zebras's round trip =300miles,
300/40=7.5
so answer is 7.5 hours.
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