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:

• A. 1 X 10² cm³
• B. 2 X 10² cm³
• C. 1.763 X 10² cm³
• D. None of these

Answer 1

The correct option is B 2 X 10² cm³

$VolumeV=l\times b\times t$

$=12\times$ $6\times 2.45=176.4c{m}^3$

$V=176.4\times {10}^{2}c{m}^3$

Since, the minimum number of significant figure is one in breadth, hence volume will also contain only one significant figure.
Hence, $V=2\times {10}^{2}c{m}^3$.