Question
The length, breadth and thickness of a block are given by l = 12 cm, b = 6 cm and t = 2.45 cm. The volume of the block according to the idea of significant figures should be
1 × 102 cm3
2 × 102 cm3
1.76 × 102 cm3
None of these
Solution
B.
2 × 102 cm3
Using relation for volume
Given:- length of a block = 12 cm
breadth of a block = 6 cm
thickness of a block = 2.45cm
V =length × breadth × thickness
=12 × 6 × 2.45 = 176.4
=1.764 ×102 cm3
The minimum number of significant figures is 1 in thickness, hence the volume will contain only one significant figure.
Therefore V= 2 ×102 cm3
