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The motion of a particle is described by...

The motion of a particle is described by the equation `x = a+bt^(2)` where `a = 15` cm and `b = 3 cm//s`. Its instantaneous velocity at time 3 sec will be

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A, C, D
Av. Velocity `=("Displacement")/("time")`
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ALLEN -MOTION IN A PALNE-EXERCISE-02
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