We can use the equation:
$h = \frac{1}{2}gt^2$
where $h$ is the height (3.0 m), $g$ is the acceleration due to gravity (9.81 m/s²), and $t$ is the time. Solving for $t$, we get:
$t = \sqrt{\frac{2h}{g}}$
Now, we can plug in the values:
$t =
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