Answer:
72 yd²
Explanation:
From the question,
Applying
A = Lb+Lw+Lh............... Equation 1
Where A = surface area of the three triangular prism.
From the question,
Given: L = 6 yd, b = 4 yd, w = 5 yd, h = 3 yd
Substitute these values into equation 1
A = (6*4)+(6*5)+(6*3)
A = 24+30+18
A = 72 yd²
Hence the right option is 72 yd²