Aptitude - Square Root and Cube Root - Discussion

Discussion :: Square Root and Cube Root - General Questions (Q.No.12)

12. 

0.0169 x ? = 1.3

[A]. 10
[B]. 100
[C]. 1000
[D]. None of these

Answer: Option B

Explanation:

Let 0.0169 x x = 1.3.

Then, 0.0169x = (1.3)2 = 1.69

x = 1.69 = 100
0.0169


Bathula Suresh said: (Jul 20, 2011)  
The given value is 169/10000,so while applying root to the value we get 13/100, i.e;0.13

So if we multiply with 10 .den we get 1.3
ANS=10

Guru said: (Dec 30, 2011)  
No answer is not 10 because we have remove the square root from 0.0169X
So (1.3)2
then,
0.0169X= (1.3*1.3)
0.0169X=1.69

X=1.69/0.0169
x=169/100/169/10000
then x= 169/100 * 169/10000
x=100 answer

Parag said: (Jul 28, 2013)  
No need to calculate simply how many digit(0)need to get 1.69 from 0.0169 that 2 digit need to move from right side from 0.0169 to left side that much zero need to add to 1.

Ravi said: (Oct 24, 2013)  
@Guru.

If you remove the square root from 0.0169X, then why you have squared 1.3 like (1.3)^2.

Radhika K R said: (Jan 1, 2014)  
Hey, Answer must be 100:

13 * 10^(-2) * root(x) = 1.3.

root(x) = 1.3 / (13 * 10^(-2) ).
root(x) = 10.

x = 10 * 10 = 100.

Ashish said: (Jul 18, 2015)  
Yes the answer is 100.

Root of (0.0169*x) = 1.3.

Root of (169/10000*x) = 1.3.

13/100*(root of x) = 1.3.

Root of x = 1.3*(100/13).

Root of x = 10.

So finally x= square of 10 which is 100.

Kewal said: (Mar 22, 2017)  
Thanks for all your explanation of the answer.

Aleena said: (Apr 1, 2020)  
Answer is 10. How it will be 100?

Archana Padhi said: (Jul 17, 2020)  
The Correct Answer is 10.

Asna said: (Jun 20, 2021)  
10 is the right answer.

Joshna said: (Jul 16, 2021)  
Yes, agree, the correct answer is 10.

Marsel said: (Oct 9, 2021)  
The answer is 100 as x has a square in it when removing the no.

So, finally, when we get 10 as the answer we square 10 as the answer is 100.

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