SOLUTION: The 42 km drive from Oakdale to Ridgemount usually takes 28 minutes. Because highway construction reduces the speed limit it takes 14 minutes longer. Find the reduced speed limit.

Question 1010340: The 42 km drive from Oakdale to Ridgemount usually takes 28 minutes. Because highway construction reduces the speed limit it takes 14 minutes longer. Find the reduced speed limit.
Answer by fractalier(6550) (Show Source): You can put this solution on YOUR website!
You can use rate times equals distance on this one...rt = d...r = d/t
Since the distance is the same, we know (using time in minutes)...
42 km/28 min = 1.5 km/min = 90 km/hr
42 km/42 min = 1.0 km/min = 60 km/hr

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