Solution:
Given, the number is 36000.
Prime factorisation of 36000 is 36000 = 2^5 × 3^2 × 5^3

To find the number of even factors of 36000, we need to consider only the even powers of 2, 3 and 5.

- Number of even factors of 2 = 6
- Number of even factors of 3 = 3
- Number of even factors of 5 = 4

Therefore, the total number of even factors of 36000 = 6 × 3 × 4 = 72.

Now, we need to find the number of factors of 36000 that are divisible by 9 but not by 36.

- Divisibility by 9: A number is divisible by 9 if the sum of its digits is divisible by 9.
- Divisibility by 36: A number is divisible by 36 if it is divisible by both 9 and 4.

To find the factors of 36000 that are divisible by 9 but not by 36, we need to consider the factors of 36000 that have exactly one factor of 3 and no more than one factor of 2^2. This is because a factor of 36000 that has two factors of 3 or two or more factors of 2^2 will be divisible by 36.

- Number of factors of 36000 with exactly one factor of 3 = 2 × 4 × 5 = 40 (2 choices for the powers of 2, 4 choices for the powers of 5, and only 1 choice for the power of 3).
- Number of factors of 36000 with no more than one factor of 2^2 = 3 × 2 × 4 = 24 (3 choices for the powers of 2, 2 choices for the powers of 5, and 2 choices for the power of 2^2).

Therefore, the number of even factors of 36000 that are divisible by 9 but not by 36 = Number of factors of 36000 with exactly one factor of 3 and no more than one factor of 2^2 = 24.

Hence, the correct answer is option B (4).