Assuming the speed of sound in air equal to 340 m s−1 and in water equal to 1360 m s−1, find the time taken to travel a distance 1700 m by sound in (i) air and (ii) water.
The time interval between a lightning flash and the first sound of thunder is 5 s. If the speed of sound in air is 330 m s−1, find the distance of flash from the observer.