GATE Electronics and Communications (EC) 2015 Shift 1 Solved Paper

In the system shown in figure (a), $\mathit{m}\left(\mathit{t}\right)$ is a low-pass signal with bandwidth W Hz. The frequency response of the band-pass filter $\mathit{H}\left(\mathit{f}\right)$ is shown in figure (b). If it is desired that the output signal $\mathit{z}\left(\mathit{t}\right)=10\mathit{x}\left(\mathit{t}\right)$, the maximum value of W (in Hz) should be strictly less than _______.