A rectangular parallelepiped with an edge of a meter is arbitrarily cut into two cuboids with a surface area of () square meters. A.6a2 B.8a2 C.10a2 D.12a2

A rectangular parallelepiped with an edge of a meter is arbitrarily cut into two cuboids with a surface area of () square meters. A.6a2 B.8a2 C.10a2 D.12a2

A×a×6+a×a×2,
=6A2+2a2,
=8A2;
Answer: These two cuboids have a surface area of 8 a 2 square meters.
Therefore: B.

A×a×6+a×a×2,
=6A2+2a2,
=8A2;
Answer: These two cuboids have a surface area of 8 a 2 square meters.
Selected from: B.

Cut a cube into two identical cubes, increasing the surface area by 18 square centimeters, and the volume of the cube is ______ cubic centimeters. Cutting a cube into two identical cubes, increasing the surface area by 18 square centimeters, the volume of this cube was ______ cubic centimeters.

Area of cuboid section:18÷2=9(cm2)
Since 3×3=9,
So this cube has an edge of 3 centimeters,
Volume of cube:3×3×3=27(cubic centimeter)
A: The volume of this cube is 27 cubic centimeters.
Therefore, the answer is:27.

Area of cuboid section:18÷2=9(cm2)
Since 3 x 3=9,
So it's three centimeters long.
Volume of cube:3×3×3=27(cubic centimeter)
A: The volume of this cube is 27 cubic centimeters.
Therefore, the answer is:27.