Answer:
The formula which relates distance d, time t, and speed or rate of travel r is:
d = rt.
We're given that the traveled distance d = 400 km and an average speed, r = 80 km/hr.
Substituting into the distance-rate-time formula for d and r to find the time t traveled , we get:
d = rt
400 km = (80 km/hr)t
Now, dividing both sides by 80 km/hr, we have:
(400 km)/(80 km/hr) = [(80 km/hr)t]/(80 km/hr)
[(400 km)/(80 km)]hr = [(80 km/hr)/(80 km/hr)]t
5 hr = [1]t
t = 5 hr is how long a trip will take in hours if you travel 400 km at an average speed of 80 km/hr.
Explanation:
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