A particle moving in a straight line covers a distance of x cm in t second, where x = t3 + 6t2 15t + 18. What will be the velocity of the particle at the end of 2 seconds?

A particle moving in a straight line covers a distance of x cm in t se

1.	A particle moving in a straight line covers a distance of x cm in t second, where x = t³ + 6t² 15t + 18. What will be the velocity of the particle at the end of 2 seconds?
A.	20cm/sec
B.	22cm/sec
C.	21cm/sec
D.	23cm/sec
Answer» D. 23cm/sec

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A particle moving in a straight line covers a distance of x cm in t second, where x = t3 + 6t2 15t + 18. What will be the velocity of the particle at the end of 2 seconds?

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A particle moving in a straight line covers a distance of x cm in t second, where x = t³ + 6t² 15t + 18. What will be the velocity of the particle at the end of 2 seconds?