A block of wood measuring 2.75 cm x 4.80 cm x 7.50 cm has a mass of 84.0 g. will the block of wood sink or float in water?

The volume of the block of wood is given by length * width * height

= 2.75 * 4.80 * 7.5

= 99 cm³

Density is given by mass/volume

Thus = 84.0 g / 99 cm³

= 0.848 g/cm³

Hence; since the block is less dense than water (1 g/cm³) it will float