speed of point A is given as
[tex]v_a = 20.9 m/s[/tex]
[tex]v_a = r*\omega[/tex]
here r = distance from the axis
so here we have
[tex]20.9 = r*23[/tex]
[tex]r = 0.91 m[/tex]
now the distance of point A and B is 0.71 m
while the distance of axis from point A is 0.91 m
so distance of axis from point B will be given as
[tex] r = 0.91 + 0.71 = 1.62 m[/tex]
now for the speed of point b is given as
[tex]v = r \omega[/tex]
[tex]v = 1.62 * 23[/tex]
[tex]v = 37.26 m/s[/tex]
so end point B will move with speed 37.26 m/s