A Vibrating Tuning Fork of 725 Hz Is Held Above $\Delta$

A vibrating tuning fork of 725 Hz is held above a tube filled with water.Successive resonances are heard when the water level is lowered by 11.5 cm and 34.5 cm from the top of the tube.Calculate a value for the speed of sound.(Hint: remember the small end correction $\Delta$ L at the top of the tube.)

A) 333 m/s
B) 343 m/s
C) 325 m/s
D) 315 m/s
E) 338 m/s