Q. The length of a cube is 2.1 $\times 10^{- 2}$m. the volume in significant figures will be
A) $9.2 \times 10^{- 6}m^{3}$
B) $9.3 \times 10^{- 6}m^{3}$
C) $9.26 \times 10^{- 6}m^{3}$
D) $9.261 \times 10^{- 6}m^{3}$
Explanation
Volume $= \left( 2.1 \times 10^{- 2} \right)^{3}m^{3} = 9.261 \times 10^{- 6}m^{3}.$ Rounding off two significant figures, we get $9.3 \times 10^{- 6}m^{3}$.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.