3√(√(.000064))= ? · ABC26GN1467

Subject: General Aptitude · Chapter: Square Roots and Cube Roots

$\sqrt[3]{\sqrt{.000064}}=$ ?

(a). 02

(b). 2

(c)2

(d)None of these

Answer

Answer (as printed): B

Explanation

$\sqrt{.000064}=\sqrt{\frac{64}{10^{6}}}=\frac{8}{10^{3}}=\frac{8}{1000}=.008$. $$\therefore \quad \sqrt[3]{\sqrt{.000064}}=\sqrt[3]{.008}=\sqrt[3]{\frac{8}{1000}}=\frac{2}{10}=0.2 .$$

Explanation as extracted from the printed page; notation may be imperfect.

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