Test Academy | The motion of a particle is described by the equation x = a + bt² where a = 15 cm and b = 3 cm. Its instantaneous velocity at time 3 sec will be 36 cm/sec, 18 cm/sec , 16 cm/sec, 32 cm/sec

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The motion of a particle is described by the equation x = a + bt² where a = 15 cm and b = 3 cm. Its instantaneous velocity at time 3 sec will be

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36 cm/sec
18 cm/sec
16 cm/sec
32 cm/sec

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