Answer:
2
Step-by-step explanation:
2 tuijnbb
= 2025
When you are told to find the smallest length possible, you perform L.C.M(Least common multiples)
For this, you divide the given lengths using the numbers that divides all through.
I have added an image to this answer. Go through it for more explanation
You times 4 by everything inside the parentheses, so the answer would be as follows. 16a + 20b - 12
25 because it said the head of the fish in 10 the fishes tail is the same 10 plus half witch is 5 so if u add it you get 25