Five pulses are generated every 0.118 s in a tank of water...

Question

Five pulses are generated every 0.118 s in a tank of water. What is the speed of propagation of the wave if the wavelength of the surface wave is 1.46 cm?

_____________ m/s

Answer 1

The speed of sound in distilled Water at 77 °F (25 °C) is 1496 m/s

(0.0146 m) / (0.118 s) ≈ 0.124 m/s, which is about 7 orders of magnitude too small.  I suspect you have unit problems.