Respuesta :

Answer:

Surface area of the given figure = 246.6 ft²

Explanation:

Surface Area = Lateral Surface Area + Area of Base

Now,

Base is a square

Area of Square = (9)² = 81

Now,

Lateral surface area = (1÷2)×(4×9)(9.2)

                                  = (1÷2)×(36)(9.2)

                                  = (1÷2)×(331.2)

                                  = 165.6

So,

Surface Area = 165.6 + 81

                      = 246.6

∴ we get

Surface area of the given figure = 246.6 ft²

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