The correct answer is 2.2 km/s
Earthquake is a natural disaster when the tectonic plates of the Earth starts vibrating. The speed of earthquake is the velocity by which the waves will vibrate the Earth.
Given,
Wavelength λ= 13 km
Frequency f = 10 times/min
it vibrates 10 times each minute
so the frequency is defined by the number of vibrations per second
f = 10 per minute
f = 10/60
now the speed of wave is defined as
v = λ * f
v = 13 * (1/6)
v = 2.2 km/s
Therefore the speed at which the wave of earthquake having wavelength 13 km causes the ground to vibrate is 2.2 km/s.
To learn more about speed, refer: brainly.com/question/22244502
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