A stone is dropped down a well and 5 sec later the sound of the splash i...

A stone is dropped down a well and 5 sec later the sound of the splash is heard. If the velocity of sound is 1120 fps, what is the depth of the well?

a. 252.8 ft.

b. 352.8 ft.

c. 452.8 ft.

d. 552.8 ft.