(a) 0.49. Explanation: Let √(.0196/x)=0.2. Then,.0196/x=0.04 ⇔ x=.0196/.04=1.96/4=.49.

√(.0196/(?))=0.2 · ABC26GN1380

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

$\sqrt{\frac{.0196}{?}}=0.2$

(a)0.49

(b)0.7

(c)4.9

(d)None of these

Answer

Answer (as printed): A

Explanation

Let $\sqrt{\frac{.0196}{x}}=0.2$. Then, $\frac{.0196}{x}=0.04$ $$\Leftrightarrow \quad x=\frac{.0196}{.04}=\frac{1.96}{4}=.49 .$$

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

Study loop for Square Roots and Cube Roots