A naval boat is positioned above a point where earlier charts show the sea floor to be 450m below the surface. The boat moves horizontally at a steady 10m/s. Answer the following:
(i) How long after emitting a sound pulse should the boat’s SONAR expect to receive the echo? (Take the speed of sound in sea water as 1500m/s.)
(ii) How far horizontally will the boat have travelled during this interval?