A girl runs 50 miles in 60 minutes. At this rate,how long would it take her to run 15 miles?
50/60 = 15/x
50x = 900
x = 18
18
To find out how long it would take the girl to run 15 miles at the same rate, we need to determine her running speed in miles per minute first.
We can calculate her speed by dividing the distance she runs by the time it takes her. In this case, her running speed is 50 miles divided by 60 minutes:
Speed = Distance / Time
Speed = 50 miles / 60 minutes
Now, to find out how long it would take her to run 15 miles, we divide the distance by her speed:
Time = Distance / Speed
Time = 15 miles / (50 miles / 60 minutes)
Simplifying this equation, we can multiply the distance and the reciprocal of the speed:
Time = 15 miles * (60 minutes / 50 miles)
Now, we can cancel out the miles unit and calculate the time in minutes:
Time = (15 * 60) / 50
Time = 900 / 50
Time = 18 minutes
Therefore, it would take the girl approximately 18 minutes to run 15 miles at the same rate.