CTET 2 Math and Science Feb 2015 Paper

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Question : 68 of 120
 
Marks: +1, -0
I put one ear on a steel railroad track.
A. I am able to hear the approaching train sooner through the track than through the air.
B. Sound travels faster through steel as compared to air.
C. Sound travels faster through solids as compared to gases. Of the above three statements,
identify which ones are observations and which are inferences.
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