Question

5. An observer puts ear on a railway line
500 m from a friend with a hammer. When
his friend hits the railway line with the
hammer, the observer hears two sounds.
The sound is first heard through :
(a) railway line
(b) air
(c) at the same time through railway line
and air
(d) no sound is heard
please answer my question I will mark you as brilliant.​

Answer 1

Answer:

a.) is correct because metal is best conductor of sound..

Answer 2

Answer:

a) railway line

Explanation:

sound travels faster in solids than in liquids or gas