Answer:
[tex]A = 159.31\,ft^{2}[/tex]
Step-by-step explanation:
Let consider that both pyramid are simmilar. The surface area of the pyramid is directly proportional to the square of the height is:
[tex]A = (25.49\,ft^{2})\cdot \left(\frac{15\,ft}{6\,ft} \right)^{2}[/tex]
[tex]A = 159.31\,ft^{2}[/tex]