The square root of 1.21 × 104

The square root of 1.21 × 104

1.21 × 104 can be regarded as 121 × 4 × 0.26
So the square root of 1.21 × 104 is equal to 11 × 2 × 0.51 (because there is not much difference between 0.26 and 0.25, we can estimate a value), so the answer is about 11.2