Problema Solution
Two cars leave Richmond, Virginia, at the same time. The cars travel in opposite directions, one traveling north at 56 mph and one traveling south at 47 mph. When will the two care be 206 miles apart?
Answer provided by our tutors
Let
v1 = 56 mph the speed of the first car
v2 = 47 mph the speed of the second car
d = 206 mi the distance between the cars
t = the time of the travel
Since distance = speed*time we have:
v1t + v2t = d
56t + 47t = 206
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click here to see the equation solved for t
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t = 2 hr
After 2 hours the cars will be 206 miles apart.