Quantitative Aptitude Ques 154
Question: Directions: What should come in place of the question mark (?) in the following questions? [NICL (AO) 2015]
$ 25^{3}\times 4^{3}-800^{2}={{(?)}^{2}} $
Options:
A) 360000
B) 60000
C) 3600
D) 6000
E) None of these
Show Answer
Answer:
Correct Answer: E
Solution:
- $ 25^{3}\times 4^{3}-800^{2}={{(?)}^{2}} $
$ \Rightarrow $ $ {{(?)}^{2}}=25\times 25\times 25\times 4\times 4\times 4-800\times 800 $
$ \Rightarrow $ $ {{(?)}^{2}}=1000000-640000=\sqrt{360000} $
$ \Rightarrow $ $ ?=600 $
BETA
