The Time It Takes an Object to Fall a Certain

The time it takes an object to fall a certain distance is given by the formula , where t is the time in seconds and s is the distance the object has fallen. Find how long it takes an object to hit the ground, if it is dropped from the top of a building that is 140 ft in height. Round answer to 2 decimal places.

A) 2.73 sec
B) 2.82 sec
C) 2.96 sec
D) 3.08 sec