SOLUTION: John is traveling to a meeting that is 28 miles away. He needs to be there in 30 minutes. How fast does he need to go to make it to the meeting on time?

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Question 315387: John is traveling to a meeting that is 28 miles away. He needs to be there in 30 minutes. How fast does he need to go to make it to the meeting on time?
Found 2 solutions by rfer, jim_thompson5910:
Answer by rfer(16322) About Me  (Show Source):
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Use the equation d=rt where d is the distance, r is the speed, and t is the time.

So we're given that "a meeting that is 28 miles away. He needs to be there in 30 minutes.", which means that d=28 and t=0.5 (30 minutes = 0.5 hours). Plug these values in to get:

28=r%280.5%29

Now divide both sides by 0.5 and flip the equation to get r=56. So John needs to go 56 mph to go 28 miles in 30 minutes.