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i) Frequency = $\frac{30}{60}$ = 0.5 Hz
ii) Speed = $\frac{6}{2}$ = 3 m/s, wavelength = $\frac{v}{f}$ = $\frac{3}{0.5}$ = 6m
johnmulu answered the question on February 11, 2017 at 08:29
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