an ultra marathon athlete can run long distances at an average speed of 7 1/2 miles per hour. at that rate, how long will it take him to run 50 miles
To find out how long it will take the ultra marathon athlete to run 50 miles, we can use the formula:
Time = Distance / Speed
Distance = 50 miles
Speed = 7 1/2 miles per hour
Plugging in the values, we get:
Time = 50 miles / 7 1/2 miles per hour
To divide by a fraction, we can multiply by its reciprocal:
Time = 50 miles * (2/15 hours per mile)
Now we can simplify the equation:
Time = (50 * 2) miles / 15 hours
Time = 100 miles / 15 hours
Finally, we can divide:
Time = 6.67 hours
Therefore, it will take the ultra marathon athlete approximately 6.67 hours to run 50 miles at an average speed of 7 1/2 miles per hour.