Question

A sound wave travels through iron at a rate of 5120\,\dfrac{\text{m}}{\text{s}}5120

s

m

​ 5120, space, start fraction, m, divided by, s, end fraction.

At what rate does the sound wave travel in \dfrac{\text{km}}{\text{h}}

h

km

​ start fraction, k, m, divided by, h, end fraction?

Answer 1

18432 is the answer

Explanation:

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Answer 2

`18432\,km/h`

Explanation:

Given: A sound wave travels through iron at a rate of
`5120\,m/s`

To find: rate at which the sound wave travel in
`km/h`

Solution:

Use the following units conversions.

`1\,m=(1)/(1000)\,km`

`1\,s=(1)/(3600)\,h`

Now convert
`5120\,m/s` into
`km/h`

Therefore,

`5120\,m/s=((5120)/(1000))(3600)\\ =512(36)\\=18432\,km/h`