Chemical Kinetics: JEE Main 2026 Chemistry question

For a first order reaction $\mathrm{A\to B}$: at $t=0$ min, [A] = 0.6500 M; at $t=x$ min, [A] = 0.0650 M; at $t=20$ min, [A] = 0.00065 M. $x=$ ______ min. (Nearest integer)