The top of a solid cone was sawed off to form the solid attached. The top cone has a diameter of 8cm and slant height of 8cm. The solid cone has a diameter of 4cm. The solid left has a slant height of 8cm. Find the surface area of the solid formed, correct to two decimal places.
Please directly answer the question and provide the final value, e.g., 1, 2.5, 300.
Question: The top of a solid cone was sawed off to form the solid attached. The top cone has a diameter of 8cm and slant height of 8cm. The solid cone has a diameter of 4cm. The solid left has a slant height of 8cm. Find the surface area of the solid formed, correct to two decimal places.
Please first conduct reasoning, and then answer the question and provide the final value, e.g., 1, 2.5, 300, at the end.
Question: The top of a solid cone was sawed off to form the solid attached. The top cone has a diameter of 8cm and slant height of 8cm. The solid cone has a diameter of 4cm. The solid left has a slant height of 8cm. Find the surface area of the solid formed, correct to two decimal places.