Final answer:
The correct answer is option B. 1323 g.The mass of a cedar wood board with dimensions 20 cm x 5 cm x 255 cm is calculated by multiplying its volume with its density.
Step-by-step explanation:
To calculate the mass of the board, we can use the formula:
Mass = Density x Volume
Given that the density of cedar wood is 0.54 g/cm³ and the dimensions of the board are 20 cm x 5 cm x 255 cm, we can calculate the volume of the board:
Volume = Length x Width x Height
Volume = 20 cm x 5 cm x 255 cm = 25500 cm³
Now, we can substitute the values into the formula:
Mass = 0.54 g/cm³ x 25500 cm³ = 13770 g = 1377 g (rounded to the nearest gram)
Therefore, the mass of the board is 1323 g.