Problema Solution
An eastbound car is going 4 miles per hour faster than a westbound car. The cars are 208 miles apart 2 hours after passing each other on a highway. What speed, in miles per hour, of the eastbound car?
Answer provided by our tutors
Let
v = the speed of the eastbound car
v - 4 = the speed of the westbound car
d = 280 mi
t = 2 hr
Using the formula distance = speed*time we have:
vt + (v - 4)t = d
2v + 2(v - 4) = 280
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click here to see the equation solved for v
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v = 72 mph
The speed of the eastbound car is 72 mph.