Find the

Find the surface of the cuboid if its edges have the dimensions a, 2/3a, 2a

Result

S = (Correct answer is: 8*a^2) Wrong answer

Solution:

b=2/3 a c=2a  S=2(a⋅ b+b⋅ c+c⋅ a) S=2(a⋅ 2/3a+2/3a⋅ 2a+2a⋅ a) S=2(2/3+4/3+2)⋅ a2 S=2(2/3+4/3+2)⋅ a2  S=8⋅ a2

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