The distance xm travelled by a particle in time t seconds is described by the equation x = 10 + 12t², Find the average speed of the particle between the time interval t = 2s and t = 5s

60 ms^-1

72 ms^-1

84 ms^-1

108 ms^-1

Correct answer is B

speed = \(\frac{dx}{dt}\)

\(\frac{dx}{dt}\) = 10 + 12t²

\(\frac{dx}{dt}\) = 24t

\(\frac{dx}{dt}\) =24 x 3

\(\frac{dx}{dt}\) = 72 ms^-1

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The distance xm travelled by a particle in time t seconds is described by the equation x = 10 + 12t2, Find the average speed of the particle between the time interval t = 2s and t = 5s