ABC26GN0698 · Decimal Fractions

Subject: General Aptitude · Chapter: Decimal Fractions · Exam: 2009 · Marks: · Difficulty:

$\left[(?)^{2}+(18)^{2}\right] \div 125=3.56$

(a)11

(b)12

(c)14

(d)15

(e)None of these

Answer

Answer (as printed): A

Explanation

Let $\frac{x^{2}+(18)^{2}}{125}=3.56$. Then, $\quad x^{2}+324=125 \times 3.56=445$ $$\Rightarrow \quad x^{2}=121 \Rightarrow x=11 .$$

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