Answer:
Its addition I think so the answer would we 16.7399km for both trials
Step-by-step explanation:
Red Perimeter= 4u X π= 4uπ
Blue Perimeter= u X π= uπ
Red Area= 2u X 2u X π= 4u2π
Blue Area= u X u X π= u2π
That would be 25%
that is because 5 is 25% of 20
Hope this helps!