<PRE><B>Question 213688</B>
The speed limit on a certain highway is 72 km/h. What is the speed in cm/s?


Step 1.  1000 m = 1 km and 100 cm= 1 m or 10000 cm = 1 km


Step 2.  72 km/h * 1000 m/km * 100 cm/m  = 7,200,000 cm/h  (note the units cancel in km and m when multiplying the units together.


Step 3.  Answer is 7.2 million cm/h


I hope the above steps were helpful.


For FREE Step-By-Step videos in Introduction to Algebra, please visit http://www.FreedomUniversity.TV/courses/IntroAlgebra and for Trigonometry visit http://www.FreedomUniversity.TV/courses/Trigonometry.


Good luck in your studies!


Respectfully,
Dr J
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