What should come in place of question mark in the following number series?
\(26.4\times 12.5+\sqrt{22^2+20+11^2}=?^2+31\)
1
16
2
21
3
17
4
18
What should come in place of question mark in the following number series?
\(26.4\times 12.5+\sqrt{22^2+20+11^2}=?^2+31\)