SOLUTION: Mark's grandmother's house is 78 miles away. Driving at a constant speed, it takes him one hour to get there. At the same speed, how many miles would he travel in 40 minutes? at wh
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Question 830630: Mark's grandmother's house is 78 miles away. Driving at a constant speed, it takes him one hour to get there. At the same speed, how many miles would he travel in 40 minutes? at what speed is he driving? show all work!
distance=speed*time
x=y*40 minutes
??? Completely lost!!!
Answer by JulietG(1812) (Show Source): You can put this solution on YOUR website!
It's the "hour" that confuses people in this type of problem. Let's use minutes.
In 60 minutes, Mark travels 78 miles
How many miles does Mark travel in 40 minutes?
40/60 = 2/3
Mark travels 2/3 of his hourly distance in 40 minutes.
2/3 * 78 = 52 miles
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