Answers

2014-05-03T15:06:02+05:30
SPEED: it is the distance travelled per unit time. 
speed = distance/time 
it is a scalar quantity 

VELOCITY: it is the shortest distance travelled by a body per unit time 
velocity = displacement/time 
it is a vector quantity
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2014-05-03T15:08:22+05:30
Speed is calculated using the distance and  velocity is calculated using displacement.
speed is the distance travelled per unit time and velocity is the shortest distance travelled per unit time.
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