Question

The edge of a cube is a $=1.2\times {10}^{-2}m$. Then its volume will be recorded as :

• A. $1.7\times {10}^{-6}{m}^3$
• B. $1.70\times {10}^{-6}{m}^3$
• C. $1.70\times {10}^{-7}{m}^3$
• D. $1.78\times {10}^{-6}{m}^3$

Answer 1

The correct option is A $1.7\times {10}^{-6}{m}^3$

Given that the edge of a cube is $a=1.2\times {10}^{-2}m$.
The volume of a cube $=a^3$.
Volume $=[1.2\times {10}^{-2}{]}^3$
The given volume of the cube is $1.728\times {10}^{-6}{m}^3$

$\approx 1.7\times {10}^{-6}{m}^3\left(uptotwosignificantdigits\right)$