# 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

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.