using
1/V +1/U = 1/F For a mirror
U = -11cm
F= -6cm
1/V = -1/6 + 1/11
V = -66/5 = -13.2 cm
Using sign convention mentioned in question
p= 13.2 cm Image is 13.2 cm from mirror on the side of object
Its enlarged inverted image on the same side as object