The surface area of a rectangular timber with a square cross section is 114 square centimeters. After sawing off the largest cube, the surface area is 54 square centimeters. What is the surface area of the sawn cube timber?

The surface area of a rectangular timber with a square cross section is 114 square centimeters. After sawing off the largest cube, the surface area is 54 square centimeters. What is the surface area of the sawn cube timber?

After sawing off the largest cube, the surface area decreases by four squares. The area of one square is equal to the area of one face of the cube;
Area of each square = (114-54) △ 4 = 15 square centimeters;
Surface area of sawn cube wood = 15 × 6 = 90 square cm
Answer: the surface area of sawn cube wood is 90 square centimeter