A sound wave travels through iron at a rate of (5120)/(sec) At what rate does the sound wave travel in (km)/(hr)

Question

A sound wave travels through iron at a rate of
`(5120)/(sec)`

At what rate does the sound wave travel in
`(km)/(hr)`

Answer 1

So to convert this...
1 mile is 1.6 kilometer
So divide 5120 by 1.6
Then multiply sec with 3600 to get h