To calculate the volume of a triangular pyramid (also known as a tetrahedron), you can use the following formula:
\[ \text{Volume} = \frac{1}{3} \times \text{Base Area} \times \text{Height} \]
In this case, the base area is given as 60 square inches and the height is given as 13 inches. Plugging those values into the formula:
\[ \text{Volume} = \frac{1}{3} \times 60 , \text{in}^2 \times 13 , \text{in} \]
Calculating the volume:
\[ \text{Volume} = \frac{1}{3} \times 60 \times 13 \]
Calculating \(60 \times 13\):
\[ 60 \times 13 = 780 \]
Now divide by 3:
\[ \text{Volume} = \frac{780}{3} = 260 , \text{in}^3 \]
So the volume of the triangular pyramid is 260 cubic inches.
The correct answer is B. 260 in. squared (though it should be stated as cubic inches).