SOLUTION: I can not find the correct formula for the following problem: Tina runs 10 miles in 70 minutes. How long does it take her to run 7 miles? I have tried the Distance= rate x t

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Question 239884: I can not find the correct formula for the following problem:
Tina runs 10 miles in 70 minutes. How long does it take her to run 7 miles?
I have tried the Distance= rate x time but it doesn't make sense.
Found 2 solutions by ankor@dixie-net.com, solver91311:
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Tina runs 10 miles in 70 minutes. How long does it take her to run 7 miles?
:
Find her speed (mi/min): Speed = dist%2Ftime
s = 10/70
s = 1%2F7 mi/min
:
Find the time:
Time = dist%2Fspeed
t = 7%2F%281%2F7%29
invert the dividing fraction and multiply
t = 7 * 7%2F1
t = 49 minutes to run 7 miles

Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


If you know the rate and the time and want to calculate the distance, use Distance = Rate X Time:

If you know the distance and the rate and want to calculate the time, take and divide both sides by to get

If you know the distance and the time and want to calculate the rate, take and divide both sides by to get

So you need to first use where to get the rate, and then use where to get the time.

Always remember to pay attention to the units of measure. If you just divide 10 miles by 70 minutes, you are going to get miles per minute -- NOT miles per hour.

John