Quantitative Aptitude Ques 1005

Question: Directions: What value will come in place of question mark (?) in the following questions?

$ \frac{3}{19} $ of 30% of $ 3420={{?}^{2}}\times 2 $

Options:

A) $ {{(81)}^{2}} $

B) 7

C) 9

D) 81

E) 49

Show Answer

Answer:

Correct Answer: C

Solution:

  • $ \frac{3}{19}\times \frac{30}{100}\times 3420={{?}^{2}}\times 2 $

$ \Rightarrow $ $ {{?}^{2}}=\frac{3\times 3\times 18}{2} $

$ \Rightarrow $ $ {{?}^{2}}=9\times 9 $
$ \Rightarrow $ $ ?=9 $