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Question

Each side of a cube is measured to be $$7.203\ m$$.The volume of the cube to appropriate significant figure is:


A
31.3 m3
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B
313 m3
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C
373.7 m3
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D
37.3 m3
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Solution

The correct option is C $$373.7\ m^3$$
Side of cube  $$a = 7.203 \ m$$
Volume of cube  $$V = a^3$$
$$\implies \ V = (7.203)^3 = 373.714 \ m^3$$
Since the value of side of cube has 4 significant figures, thus the value of volume of cube must also have 4 significant figure.
Thus volume of cube  $$V = 373.7 \ m^3$$

Physics

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