A particle moves along a straight line OX. At a time t (in s Q. A particle moves along a straight line O X. At a time t (in second), the distance x (in metre) of the particle from O is given by x = 20+14t-t^3. a) (3)^1/2 b) (5)^1/2 c) (8)^1/2 d) (18)^1/2.
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