Answer
65.0
Work Step by Step
Using the Pythagorean Theorem, we can plug in our variable and then solve:
$${a}^2+{b}^2 = {c}^2$$
$${25.0}^2+{60.0}^2 = {c}^2$$
Rearranging gives:
$${c} = \sqrt{{25}^2+{60}^2}$$
The answer, to 3 significant digits is
$$c= 65.0$$
