Final answer:
The dimension of A is [L²]/[LT²].
Step-by-step explanation:
The dimension of A can be determined by analyzing the dimensions of the terms in the equation a = b² / c. The dimension of b is [L]/[T]² and the dimension of c is [L].
To find the dimension of a, we substitute the given dimensions:
[a] = [b²] / [c] = ([L]/[T]²)² / [L] = [L]² / ([T²] · [L]) = [L²]/[LT²]
Therefore, the dimension of A is [L²]/[LT²].