SSC JE Mechanical Engineering 2017 Set 2 Paper

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Question : 74 of 200
 
Marks: +1, -0
With reference to the interior of the earth consider the following statements.
1. The P-waves are similar to sound waves.
They can travel through only solid material.
2. The mean thickness of continentals crust is around 30 km.
3. The surface waves are the last to report on seismograph.
Which of the statements given above is / are correct ?
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