Answer: The correct option is (B) 48 m².
Step-by-step explanation: Given that a triangular prism has a height of 6 meters and a triangular base with the dimensions as shown in the figure.
We are to find the value of B, the area of the base of the prism.
As shown in the figure,
the base of the prism is a triangle with base length 16 m and height 6 m.
We know that
the area of a triangle with base b units and height h units

In the given triangular base of the prism, we have
b = 16 m and h = 6 m.
Therefore, the area of the base will be

Thus, the required value of B is 48 m².
Option (B) is CORRECT.