Considering the given char array A[5][6] stored in contiguous memory in column major order; the address of a[i] [d] would be calculated as base (a) + (d*n1 +i) * size ; where base(a) =1000 (given).
Since it is a char array so size=1 and n1 is the total no of rows here n1=6 (0,1,2,3,4,5,) Substituting values we get the address of A[i] [d] = 1000 + d*6 + i