Answer:
65 ft
Explanation:
You can find the length of the hypotenuse using the formula a^2+b^2=c^2 where c is the hypotenuse and the other two sides are a and b.
16^2=256
63^2=3969
256+3969=4225
4225=c^2
Get c by itself by taking the square root of both sides.
This leaves you with c=65