Square Root and Cube Root - General Aptitude

Q1:

0.0169 x ? = 1.3

A 10

B 100

C 1000

D None of these

ANS:B - 100

Let 0.0169 x x = 1.3. Then, 0.0169x = (1.3)2 = 1.69

 x = 1.69 = 100
0.0169