Kumar and gunwant were waiting to go across a railway crossing kumar jumped over the barrier and curiously put his ear on the railway track .Gunwant opposed kumar and pulled him away from the railway track.
a. Why did kumar put his ear on the railway track?
b. In which of the following mediums the sound travels faster:
a. chopper. b. water
Why did Gunwant pull kumar away from the railway t?



A. to know of a train approaching
b. copper
c. as the velocity of sound is greater in copper it may produce sounds of higher frequency which can damage one's ear.