[tex] \text{Area of a base:}\\\\A_b=\dfrac{6\cdot8}{2}=24\ ft^2\\\\\text{Areas of the rectangles}\\\\4\ yd=4\cdot3\ ft=12\ ft\\\\A_1=6\cdot12=72\ ft^2\\A_2=8\cdot12=96\ ft^2\\A_3=10\cdot12=120\ ft^2\\\\\text{Surface area of the triangular prism}\\\\SA=2A_b+A_1+A_2+A_3\\\\SA=2\cdot24+72+96+120=336\ ft^2 [/tex]
