IBPS Clerk Prelims Model Paper 6

Concept:Solve the radical equation by isolating the square root and then squaring both sides.Explanation:Given: $\sqrt{?} - 11 = \sqrt{1521}$.First, simplify the known square root: $\sqrt{1521} = 39$.So, $\sqrt{?} - 11 = 39$.Add 11 to both sides: $\sqrt{?} = 39 + 11 = 50$.Square both sides to find the value under the root: $? = (50)^2 = 2500$.Now check the options: $2500$ is not listed directly.Option A is $\sqrt{2500} = 50$, which is the value of $\sqrt{?}$, not $?$.Option D is also $50$, again not $?$.Therefore, the required value $2500$ is not among the given options.Answer:$? = 2500$, so the correct choice is “None of these” (Option E).