Answer:
28.8 m
Step-by-step explanation:
According to the question, the position of the body changes with time according to the equation given as

(a) The position of the object at t = 2.4 s
Substitute the value of t as 2.4 s in the above expression, we get

x = 28.8 m
Thus, the position of the object at t = 2.4 s is 28.8 m.