A ball is dropped from the top of an abandoned well. Exactly 3.1 seconds later, the sound of the ball hitting the bottom is heard by the person standing at the top of the well. How deep is the hole? Assume that the distance fallen by the ball in t seconds is $\displaystyle {d}={16}{t}^{{2}}$, and that sound travels at a speed of 1100 ft/sec.

The well is feet deep.    Round your answer to the nearest tenth.