SOLUTION: John went jogging for 120 minutes. He averaged a speed of 4.5 mph. How long would the same jog take him if he ran at a speed of 5 mph

Question 450877: John went jogging for 120 minutes. He averaged a speed of 4.5 mph. How long would the same jog take him if he ran at a speed of 5 mph
Found 3 solutions by jorel1380, solver91311, ilana:
Answer by jorel1380(3719)   (Show Source): You can put this solution on YOUR website!
120 mins.=2 hr.x4.5mph=9 miles
9 miles/5mph=1.8hrs=108 mins..
Answer by solver91311(24713)   (Show Source): You can put this solution on YOUR website!

If someone does something for 120 minutes, they are also doing it for 2 hours. If he jogs for 2 hours at 4.5 mph, he must have traveled 9 miles. If he goes 9 miles at 5 mph, then it takes him 9/5 hours, or 1.8 hours. 1.8 hours times 60 minutes is your answer in minutes.

John

My calculator said it, I believe it, that settles it

Answer by ilana(307)   (Show Source): You can put this solution on YOUR website!
If he jogged 2 hours at 4.5 miles per hour, he jogged 2 * 4.5 = 9 miles. Use the formula distance = rate * time (d=rt) again to find the new time with the new rate for the same distance. He would have run 9miles/5mph = 1.8 hours.
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