ABC26GN0684 · Decimal Fractions

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

$\left(\frac{0.05}{0.25}+\frac{0.25}{0.05}\right)^{3}=$ ?
(a)139.4
(b)140
(c)140.6
(d)143.9
Answer
Answer (as printed): C
Explanation
$\left(\frac{0.05}{0.25}+\frac{0.25}{0.05}\right)^{3}=\left(\frac{5}{25}+\frac{25}{5}\right)^{3}$ $$=\left(\frac{1}{5}+5\right)^{3}=\left(\frac{26}{5}\right)^{3}=(5.2)^{3}=140.608 .$$

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

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