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Velocities of Racecars

GMAT-KMYAVM

A special race car travels at a rate of $ D=t^2-2Vt $ where $D$ is the distance traveled, $V$ is the velocity of the race car, and t is elapsed time.

What is the value of $t$ if the race car travels $12$ miles at a velocity of $2$ miles per minute?

A

$2$

B

$6$

C

$-2$

D

$2$ or $ -6$

E

$-2$ or $ 6$