After sawing a 1-meter-long rectangular timber into two sections, its surface area increases by 0.5 square meters. What is the volume of this timber in cubic meters? Urgent~ If you want a picture, I'll send it to you..

After sawing a 1-meter-long rectangular timber into two sections, its surface area increases by 0.5 square meters. What is the volume of this timber in cubic meters? Urgent~ If you want a picture, I'll send it to you..

Add two faces
Bottom area 0.5/2 = 0.25m2
Volume 0.25x1 = 0.25m3

A 1.5-meter-long rectangular timber has a square bottom. After sawing the timber into two sections, the surface area increases by 0.18 square decimeter,
What is the original surface area of the wood?

1.5m = 15m
Bottom area = 0.18 △ 2 = 0.09 (square decimeter)
Bottom side length = 0.3 (decimeter)
Bottom perimeter = 0.3 × 4 = 1.2 (decimeter)
Side area = 1.2 × 15 = 18 (square decimeter)
Original surface area = 18 + 0.09 × 2 = 18.18 (square decimeter)

The bottom surface of a 15 decimeter high cuboid wood is square. After sawing the wood into two sections, the surface area increases by 0.18 square decimeter, which is the same as that of the original wood
How many square decimeters

The surface of a square is 0.18 △ 2 = 0.09 square decimeter
Bottom side length 0.09 = 0.3 × 0.3
Surface area 0.3 × 15 × 4 + 0.3 × 0.3 × 2 = 18.18 square decimeter