Question 1114422
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In plain English and in everyday life the terms "speed" and "velocity" are synonyms. 


In accurate scientific usage there is a difference between them: the speed is a scalar, while the velocity is a vector.


So, the correct usage depends on the context.


But in this case (in this context) I assume that they are the same, and the numerical value is  {{{945/15}}} = 63 m/s.