The speed of the approaching water wave can be calculated as follows:
Speed = Distance/Time
Speed = 1.5m/0.2s
Speed = 7.5 m/s
Therefore, the speed of the approaching water wave is 7.5 m/s.
Two successive crests of an approaching water wave are separated by a distance of 1.5m. It takes 0.2s for one crest to cover the distance of 1.5m
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