A survey vehicle is on the floor of a cavern. A sensor on the vehicle emits a sound pulse vertically upwards. The pulse reflects from the roof and returns to the sensor.
| quantity | value |
|---|---|
| frequency of sound | 4.0 kHz4.0\ \mathrm{kHz}4.0 kHz |
| wavelength of sound | 0.085 m |
| time for the echo to return | 0.040 s |
| height of the sensor above the floor | 1.2 m |
Calculate the height of the cavern.