I\'m not sure how to answer this because I don\'t feel likethere is enough given

Question

I'm not sure how to answer this because I don't feel likethere is enough given information, but this is all I got:
A wave travels along a stretched string. The vertical distancefrom crest to trough for this wave is 15cm and the horizontaldistance from crest to trough is 20cm. What are the wavelength andthe amplitude of this wave? Help please! I'm not sure how to answer this because I don't feel likethere is enough given information, but this is all I got:
A wave travels along a stretched string. The vertical distancefrom crest to trough for this wave is 15cm and the horizontaldistance from crest to trough is 20cm. What are the wavelength andthe amplitude of this wave? Help please!

Explanation / Answer

    Let     Amplitude = A     Wavelength =     Vertical distance from crest to trough, Y= 15 cm     Horizontal distance from crest to trough, X = 20cm     Vertical distance from crest to trough, Y = 2A     Amplitude, A = Y / 2                         = 15 / 2                         = 7.5 cm     Horizontal distance between crest to trough, X = / 2     Wavelength, = 2 X                          = 2 * 20                          = 40 cm

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