Q. A cube has a side of length $1.2\ \times 10^{- 2}\ m.$ Calculate its volume.
A) $1.7 \times 10^{- 6}\ m^{3}$
B) $1.73 \times 10^{- 6}\ m^{3}$
C) $1.70 \times 10^{- 6}\ m^{3}$
D) $1.732 \times 10^{- 6}\ m^{3}$
Explanation
Volume $V = I^{3} = \left( 1.2 \times 10^{- 2}m \right)^{3} = 1.728 \times 10^{- 6}m^{3}$ $\because\$length $l$has two significance figures. Therefore, the correct answer is $V = 1.7 \times 10^{- 6}m^{3}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.