Q121 / 160 · AP EAMCET 2024 (21 May Shift 2) · Physics

The length of the side of a cube is $1.2 \times 10^{-2} \mathrm{~m}$. Its volume up to correct significant figures is

  • A
    $1.732 \times 10^{-6} \mathrm{~m}^3$
  • B
    $1.73 \times 10^{-6} \mathrm{~m}^3$
  • C
    $1.70 \times 10^{-6} \mathrm{~m}^3$
  • Correct answer
    D
    $1.7 \times 10^{-6} \mathrm{~m}^3$

Solution

Length of cube, $1=1.2 \times 10^{-2} \mathrm{~m}$ $\therefore \quad$ Volume $=1^3=\left(1.2 \times 10^{-2}\right)^3=1.728 \times 10^{-6} \mathrm{~m}^3$ $\therefore$ The volume of cube upto correct significant figure is $\mathrm{V}=1.7 \times 10^{-6} \mathrm{~m}^3$

Hence, the correct answer is option: 'D'.

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