The bottom of a 2.5-meter-long cuboid wood is square. After sawing the wood into two sections, the surface area increases by 0.18 square meters. The volume of the original wood can be calculated Can we not use the equation? Better not use the equation

The bottom of a 2.5-meter-long cuboid wood is square. After sawing the wood into two sections, the surface area increases by 0.18 square meters. The volume of the original wood can be calculated Can we not use the equation? Better not use the equation

The surface area is increased by 2 bottom areas = 0.18 square meters
Floor area = 0.18 / 2 = 0.09 M2
Original timber volume = 0.09 × 2.5 = 0.225 M2

The bottom of a 1.5-meter-long cuboid wood is square. After sawing the wood into two sections, the surface area increases by 0.18 square decimeter
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PEP, 18 pages, 7 questions

The bottom is a square with side length = √ (0.18 / 2) = 0.3 (decimeter),
Surface area of wood = 15 × 4 × 0.3 + 0.3 & # 178; × 2 = 18.18 (square decimeter)

The cross section of a 1.5 meter long rectangular timber is square. After sawing the timber into two sections along the cross section, the surface area increases by 0.18 square decimeter

When it is cut into two sections, the area of two cross sections is increased. [the clearest explanation and calculation formula and result] 0.18 △ 2 = 0.09 (square decimeter) 0.3 × 0.3 = 0.09 (square decimeter) the length, width and height of the original cuboid are 1.5 meters, namely 15 decimeters, 0.3 decimeters and 0.3 decimeters respectively. The surface area of the original cuboid is 15 × 0