Imagine that a geologist is measuring the seismic waves produced by a volcano using twoseismographs, one 12 km and another 17 km from the volcano. During one volcano earth-quake, the waves feel like the rocking of a boat at a frequency of 1.5 Hz and an amplitudeof about 1 cm. The geologist later notices that the closer seismograph registered the wavesabout 0.85 s sooner than the other. What was the approximate wavelength of the wavesduring this episode