Length of AC is 54 units.
The midpoint of a line is a point that bisects the line into equal parts. It is equidistant from both end points of the line.
As B is the midpoint of AC,
AB = BC
∴ 4x - 5 = 11 + 2x
∴ 4x - 2x = 11 + 5
∴ 2x = 16
∴ x = 8.
Now, AC = AB + BC
∴ AC = 4x - 5 + 11 + 2x
Substituting the value of x,
∴ AC = 4(8) - 5 + 11 + 2(8)
∴ AC = 54 units
Thus, the length of AC is 54 units.
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