Question

Find the sum of digits of the multiplication of square roots of $1.21$ and $1.69$.

Answer 1

$\sqrt{1.21}=1.1$ and $\sqrt{1.69}=1.3$

Now, $\sqrt{1.21}\times \sqrt{1.69}=1.1\times 1.3$ = $1.43$

So, sum of digits of $1.43$ = $1+4+3=8$