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A bowling ball traveling with constant speed hits the pins at the end of a bowling lane 16.5 m long. The bowler hears the sound of the ball hitting the pins 2.45s after the ball is released from his hands. What is the speed of the ball?

Speed of sound=340 m/s

Bowling lane=16.5 m

Time till sound of ball heard=2.45s

This where I'm confused because I'm not sure which equations are the right ones to use.

Here is what I've attempted so far and I think I just realized its all wrong:

v=v(initial)+at

340 m/s=0+a(2.5s)

a=136m/s^2

(16.5m)/(2.45s)=6.73 s

I'm pretty sure this work is wrong but any help to start in the right direction would be much appreciated.