If the diameter of the base of a closed right circular cylinder be equal to its height `h ,` then its whole surface area is (a) `2pih^2` (b) `3/2pih^2` (c) `4/3pih^2` (d) `pih^2`

Explanation

To solve the problem, we need to find the whole surface area of a closed right circular cylinder given that the diameter of the base is equal to its height \( h \).

### Step-by-step Solution:

1. **Understand the relationship between diameter, radius, and height**:
- The diameter \( d \) of the base of the cylinder is given to be equal to the height \( h \).
- We know that the diameter is twice the radius, so we can express this relationship as:
\[
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