Perimeter of base x height. So, (3+4+5)x6. 12x6=72. 72 is the surface area.
6 because 18+6=24+6=30+6=36
You can maybe enter your question on google if you dont get any answers
ANSWER
The length of the conjugate axis is 6 units.
EXPLANATION
The given hyperbola has equation:

We can rewrite this equation in the form:

We compare this equation to:

This implies that;

and

The length of the conjugate axis of a hyperbola is

Substitute b=3 to obtain;
