Problema Solution
Maria leaves Brno at 9 AM. Maria's speed is 60 km/h. Irina leaves Prague at 10 AM. Irina's speed is 100 km/h. When will Maria and Irina meet?
Answer provided by our tutors
Since the distance between Brno and Prague is 186 kilometers we have d = 208 km.
v1 = 60 km/h
t = Maria's time of the travel
v2 = 100 km/h
t - 1 = Irina's time of the travel
Since speed*time = distance we can write:
v1t + v2(t - 1) = d
60t + 100(t - 1) = 208
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click here to see the equation solved for t
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t = 1.925 h
t = 1 h 0.925*60 min
t = 1 h 56 min
1 h 56 min after 9 AM is 10:56 AM
Maria and Irina will meet at 10:56 AM.