Destiny reached the 3-km mark of the race at 10:36am and the 5-km mark at 10:44am. WHat is her running rate

Running rate of Destiny is 15 kmph

Step-by-step explanation:

Running rate of Destiny is the speed at which Destiny is running.

It can be calculated by finding the difference in the distance covered to the difference in the time taken.

So,

Running rate = Difference in distance covered / Difference in time taken

Difference in distance covered = 5-3 = 2 km

Difference in time taken = 10:44 am - 10:36 am = 44 - 36 minutes = 8 mins = 8/60 hour = 2/15 hour

Running rate = 2 / (2/15) kmph = (2*15) / 2 = 15 kmph

∴Running rate of Destiny is 15 kmph