Question

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

• A. $1\times {10}^{2}c{m}^3$
• B. $2\times {10}^{2}c{m}^3$
• C. $1.763\times {10}^{2}c{m}^3$
• D. None of these

Answer 1

Answer: (B)

$2\times {10}^{2}c{m}^3$

Since question contains atleast 1 significant number in one of the value, therefore, we should write the answer in such a form that it contains only one significant figure. $V=lbt=12\times 6\times 2.45=2\times {10}^{2}c{m}^3$