Q. After every 45 min trip, a car will take a 15min break. In highway, the car's rate is 60m/h, and in country road, the rate is 40m/h. In a 4 hour trip, the car can travel how many more miles in highway than in country road?
We know that for every 45 min ,the car will take 15 min break.
So,for 4 hours travel the car would take 15min *4 = 1 hour break.
Hence,Total time for which the car would travel is 3 hours only (and not 4 hours as 1 hour goes for break).
Now , we know the rate at which the car can travel in both kind of roads .Lets calculate the distance travelled :
Highway road : 3hr * 60 = 180 miles.
Country road : 3 hr * 40 = 120 miles.
We are asked the difference = 180 -120 = 60 miles.
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