$\"\"$

The position function $\"\"$ .

Where $\"\"$ is the initial velocity of the object $\"\"$ .

$\"\"$ is the initial position of the object .

Position function:

$\"\"$

$\"\"$ .

After $\"\"$ , the stone reaches the ground $\"\"$ .

Equate $\"\"$ at $\"\"$ .

$\"\"$

The initial height of the stone is $\"\"$ .

Height of the building is $\"\"$ .

$\"\"$

Height of the building is $\"\"$ .