Answer: The answer is 716.8 km/hr
Explanation:
The main idea here is the convert the given units to km and hr. Here's the conversion factors.
1mi= 1.6km
1hr= 60min
We have to multiply 335miles by 1.60km/mi in order to get the answer in km then again we have to multiply 45 minutes by 1hr/60min in order to get the answer in hr.
The last step is to calculate the speed using the formula : v=d/t
=537.6km/0.75hr
=716.8km/hr
