A sound pulse is emitted from the underside of a boat. It passes through the water, then bounces off the seabed. The echo returns to the boat $1.3\,\text{s}$ after the pulse was emitted. The seabed lies $1000\,\text{m}$ beneath the boat. From this information, what is the speed of sound in the water?
- A$770\,\text{m s}^{-1}$
- B$1300\,\text{m s}^{-1}$
- C$1500\,\text{m s}^{-1}$
- D$2600\,\text{m s}^{-1}$