Question

Velocity of sound
Try this
1. Take your friend to a place where there are iron pipes eg. the school
verandah, a staircase or a fence.
2. Stand near one end of the pipe and ask the friend to stand 20 to 25
feet away from you near the pipe.
3. Ask the friend to gently tap the pipe with a stone. Press your ear to the pipe and listen
to the sound coming through the pipe.
4. The same sound coming through the air can also be heard. But which sound reaches
you first?
From the above activity you can see that you hear the sound through the iron pipe much
before you hear it coming through air. This shows that sound travels faster in iron than
in air.

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Answer 1

Explanation:

Express this ratio in simplest form.

(1) 18:30

Answer 2

Answer: Yes, you are right.

Thanks for the information.