Question
The dimensions of a block are 4.156x1.23x1.123. Express its volume to appropriate significant figures.
Solution
Volume of the block is given by 
Volume of block is, V = 4.156 x 1.23 x 1.123
= 5.7406412 units
Out of three multiplied numbers, 1.23 has least number of significant figures i.e. three.
Therefore, on rounding the volume to three significant figures we get,
V = 5.74 units.
