What is the volume of a 400 x 15 x 2 cm birch board?

Initial data: L (length of a birch board) = 400 cm; B (width of a birch board) = 15 cm; s (birch board thickness) = 2 cm.

Reference values: by condition ρb (density of birch tree) = 650 kg / m3.

SI: L = 400 cm = 4 m; B = 15 cm = 0.15 m; s = 2 cm = 0.02 m.

1) The volume of a birch board: V = L * B * s = 4 * 0.15 * 0.02 = 0.012 m3.

* 2) The mass of a birch board: m = ρb * V = 650 * 0.012 = 7.8 kg.

Answer: The volume of a birch board is 0.012 m3, and its weight is 7.8 kg.