[填空题]
A bowling ball traveling with constant speer4ca2 vfsi8k, d hits the pins at the zy8,;lzinclb,xf0h- s9i m v*end of a bowling lane 16.5 m long. The bowler hears the snb8smzyf;0z- ci, li ,hv*9 lxound of the ball hitting the pins 2.50 s after the ball is released from his hands. What is the speed of the ball? The speed of sound is 340 m/s. m/s