What is the difference between speed and velocity?

Aspeed does not include time, but velocity does.
Bspeed does not include a direction, but velocity does.
Cspeed is used to calculate acceleration, but velocity is not.
Dspeed is used to calculate the rate of motion, but velocity is not.

Verified Answer :

AL2006

Speed does not include a direction, but velocity does.

       30 miles per hour north
and
       30 miles per hour west

Same speed.
Different velocity.