In an experiment, two students investigated the speed and frequency of waves on the sea. This is shown is Fig. 3.1.
The two students stood 60 metres apart on a pier that projected a long way into the sea.
Student A waved his hand when a wave passed him. At that moment, student B started a clock.
Student B watched the wave as it moved towards him. When the wave reached him, he stopped the clock.
The students repeated this procedure until they had four results. Fig. 3.2 shows the clock dials for the four results.
Read the dials and then determine:
(i) the average time taken for the wave to travel 60.0 metres .
(ii) the average speed of the wave.
Select one of the following: