Answer:
Total Surface Area of the Prism=640 square meters
Chris made a mistake in calculating the area of the rectangular base.
Step-by-step explanation:
<u>Dimension of the Triangle</u>
Base=16m, Height=15m
Area of the Two triangular Faces =0.5 X 16 X 15 X 2=240 square meters
This is correct
<u>Dimensions of the Rectangles</u>
16m by 8m, 17m by 8m, 17m by 8m
Area of the Rectangular Faces=(17X8)+(17X8)+(16X8)=400 square meters
- Total Surface Area of the Prism=240+400=640 square meters
- Chris' Error was in calculating the area of the base of the prism as (17 x 8) instead of (16 X 8).
