ABC26GN2970 · Ratio and Proportion

Subject: General Aptitude · Chapter: Ratio and Proportion · Exam: 2010 · Marks: · Difficulty:

Which of the following represents $a b=64$ ?

(a)$8: a=8: b$

(b)$a: 16=b: 4$

(c)$a: 8=b: 8$

(d)$32: a=b: 2$

(e)None of these

Answer

Answer (as printed): D

Explanation

(a) $8: a=8: b \Rightarrow 8 a=8 b \Rightarrow a=b$. $a: 16=b: 4 \Rightarrow 4 a=16 b \Rightarrow a=4 b$. $a: 8=b: 8 \Rightarrow 8 b=8 a \Rightarrow b=a$. $32: a=b: 2 \Rightarrow a b=64$.

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

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