$\"\"$

Time taken by an object to fall is $\"\"$ .

Where $\"\"$ is time in sec.

$\"\"$ is distance in ft.

Skydiver falls before the parachute opens, $\"\"$ .

Substiute the value of $\"\"$ in the equation $\"\"$ .

$\"\"$

Squaring on both sides.

$\"\"$

Distance travelled is $\"\"$ .

$\"\"$

The skydriver falls $\"\"$ before the parachute opens.