Answer
The time to fall from 3200 meters to 450 meters is 24 seconds. The speed at 450 meters would be 235 m/s.
Work Step by Step
We will first rearrange the following to find $t$:
$y = \frac{1}{2}at^2$
$t = \sqrt{\frac{2y}{a}} = \sqrt{\frac{(2)(2750)}{9.80}} = 24 ~s$
Next, we use the following equation to find the speed:
$v = v_0 + at = 0 + (9.8)(24) = 235 ~m/s$
The time to fall from 3200 meters to 450 meters is 24 seconds. The speed at 450 meters would be 235 m/s.
