The time taken by the ball to reach ground level if it is dropped from 288 ft above the ground.
The time taken by ball to reach ground level is .
The height of an object dropped from a height above the ground after t seconds is given by where h is measured in feet.
The height of the ball will be zero when it reaches the ground.
It is given that the ball is dropped from 288 ft above the ground.
Therefore, substitute for and for in the equation .
Simplify further as follows.
Note that, time will always be positive.
Thus, the time taken by ball to reach ground level is .
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