A long distance that I have started on a course at average speed of nine my para half an hour later a second round pick in the same course as an average speed of 11 mph how long after the second runner starts well the second runner overtake the first runner

t = 2.25 hrs

Step-by-step explanation:

Given:

- The first runner speed v1 =  9 mph

- The second runner speed v2 = 11 mph

- Second runner starts half an hour later than first

Find:

how long after the second runner starts well the second runner overtake the first runner

Solution:

- The time taken by second runner = t

- Distance traveled by first runner d is as follows:

                            d = 9* ( t + 0.5 )

- Distance travelled by second runner d is as follows:

                            d = 11*t

- Since the distance covered d is same for both runners then we equate the two expressions:

                            11*t = 9*t + 4.5

                            3*t = 4.5

                             t = 2.25 hrs

- They will meet after 2.75 hrs after first runner starts race.