The length, breadth and thickness of a block are given by l = 12cm, b = 6 cm and t = 2.45 cm. The volume of the block according to the idea of significant figures should be:

Using the relation for volume,V = Length × Breadth × ThicknessV=1.764×102cm3The minimum number of significant figure is 1 in breadth. Hence, the volume will contain only one significant figure. Therefore, V=2×102cm3.