Poor little kid...

Puzzle 5 Short King.pdf

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Answer

The kid is 90 cm tall.

Explanation

Because he has the same height when sitting and standing and his upper body height (the top half) is the same in both cases, his lower body height must be the same in both cases.

When he is standing, his lower body height is his leg, which is 1/2 of total his height. When he is sitting, his lower body height is the height of the chair (40 cm) plus his thigh's thickness (1/9 of his height).

Call his total heigh H

=> 1/2 H = 1/9 H + 40 cm

=> 8/18 H = 40 cm

=> H = 90 cm

Free talk

Do you know how tall Chopper is?

90 cm (2'11'')