The surface area of the given figure is 222 square units
The given figure is a triangular base pyramid with 3 rectangles and 1 triangle.
Area pf the rectangles = 3(area of rectangles)
Area of rectangle = 3(5 * 14)
Area of rectangle = 210
For the triangle
Area = 1/2 * base * height
Area = 1/2 * 8 * 3
Area = 12 units square
Surface area = 210 + 12
Surface area = 222 square units
Hence the surface area of the given figure is 222 square units