What is the density of a board whose dimensions are 5.54 centimeters x 10.6 centimeters x 199 centimeters and whose mass is 28.6 grams?

In this case..........

Density = mass in grams/centimeters cubed

5.54 cm * 10.6 cm * 199 cm

= 11686.076 cm^3

Density = 28.6 grams/11686.076 cm^3

= 0.00245 grams/cm^3