Respuesta :

Answer:

[tex]b { }^{2} = (61m) {}^{2} - (11m) {}^{2} [/tex]

[tex]b {}^{2} = 3721 - 121[/tex]

[tex]b {}^{2} = 3600[/tex]

[tex] \sqrt{b {}^{2} } = \sqrt{3600} [/tex]

[tex]b = 60[/tex]