If √(18 × 14 × x)=84, then x equals · ABC26GN1376

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

If $\sqrt{18 \times 14 \times x}=84$, then $x$ equals

(a)22

(b)24

(c)28

(d)32

Answer

Answer (as printed): C

Explanation

$$\begin{aligned} & \sqrt{18 \times 14 \times x}=84 \Leftrightarrow 18 \times 14 \times x=84 \times 84 \\ & \Leftrightarrow x=\frac{84 \times 84}{18 \times 14}=28 . \end{aligned}$$

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

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