Question

The length, breadth and thickness of a block are given by I= 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. $1 \times 10^2 \, cm^3$
• B. $2 \times 10^2 \, cm^3$
• C. $1.763 \times 10^2 \, cm^3$
• D. None of these

Answer 1

Answer: (B)

$2 \times 10^2 \, cm^3$

Answer 2

Using the relation for volume V = length $\times$ breadth $\times$ thickness = $12 \times 6 \times 2.45$ = 176.4 $cm^3$ = 1.764 $\times 10^2 cm^3$ The minimum number of significant figure is 1 in breadth. Hence, the volume will contain only one significant figure. Therefore, V = $2\times 10^2cm^3$