The answer is 8.
half of 16 is 8
If you ran 4km in 9 hours.
Then you'll run 24 km's in.
4km per 9 hours
8km per 18 hours.
12km per 26 hours.
16km per 34 hours.
20km per 40.
24km per 46.
So you wont forget what you wrote and it helps you to figure out the problem. I hope this helps.
You do 27x27 and get 729 is going to be your answer
