While calculating the density of a rectangular block, a student makes the following observations:

Mass of the block (m) = 39.3 g

Length of the block (l) = 5.12 cm

Breadth of the block (b) = 2.56 cm

Thickness of the block (t) = 0.37 cm

The uncertainty of measurement of m is $\pm$ 0.1g, and in the measurement of l, b and t it is $\pm$ 0.01 cm.