College Physics Problem 1.2.8

The speed of sound is measured to be  342 m/s on a certain day. What is this in km/h?

SOLUTIONS:

We know that1km=1000m

and 

1 hr=3600 s

Convert 342 m/s.

frac{342m}{s}timesfrac{1km}{1000m}timesfrac{3600s}{1 hr}=1231.2 km/hr

Therefore, the speed of sound in km/hr is 1231.2 km/hr.

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