Answer
$90^{\circ}$
Work Step by Step
One complete revolution is equivalent to $360^{\circ}$
Degrees moved in 12 hours = $360^{\circ}$
Degrees moved in 1 hour = $\frac{360^{\circ}}{12}$ = $30^{\circ}$
Degrees moved in 3 hours = $30^{\circ} \times 3$ = $90^{\circ}$
