Solution
Expression : $$\sqrt{1+\frac{x}{144}}=\frac{13}{12}$$
Squaring both sides,
=> $$(1+\frac{x}{144})=(\frac{13}{12})^2$$
=> $$\frac{144+x}{144}=\frac{169}{144}$$
=> $$144+x=169$$
=> $$x=169-144=25$$
=> Ans - (D)
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