Cars speeds

Distance from city A to city B is 108 km. Two cars were simultaneously started from both places. The speed of a car coming from city A was 2 km/h higher than the second car. What was the speed of each car if they met in 54 minutes?

Correct result:

a =  61 km/h
b =  59 km/h

Solution:

a=2+b
108 = 54/60•(a+b)

a-b = 2
54a+54b = 6480

a = 61
b = 59

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