The correct option is B 15 5/8The cube of 21/2 nbsp; = nbsp; (21/2)^3 nbsp; nbsp; nbsp; nbsp; nbsp; nbsp; nbsp; nbsp; nbsp; ...

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To Make a Given Number a Perfect Cube

The cube of 2...

Question

The cube of $2 \frac{1}{2}$ is ____.

14 \frac{1}{2}

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15 \frac{5}{8}

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14 \frac{5}{8}

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15 \frac{3}{8}

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Solution

The correct option is B $15 \frac{5}{8}$
The cube of $2 \frac{1}{2} = (2 \frac{1}{2})^{3}$

$= 2 \frac{1}{2} \times 2 \frac{1}{2} \times 2 \frac{1}{2} = \frac{5}{2} \times \frac{5}{2} \times \frac{5}{2} = \frac{125}{8} = 15 \frac{5}{8}$

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Similar questions

21

Find the cube of 2 $\frac{1}{3}$ .

([\begin{matrix} 1 & w & w^{2} \\ w & w^{2} & 1 \\ w^{2} & 1 & w \end{matrix}] + [\begin{matrix} w & w^{2} & 1 \\ w^{2} & 1 & w \\ w & w^{2} & 1 \end{matrix}]) [\begin{matrix} 1 \\ w \\ w^{2} \end{matrix}] = [\begin{matrix} 0 \\ 0 \\ 0 \end{matrix}]

Find the cubes of :
(i) -11 (ii) -12 (iii) -21

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