Doosjespuzzel – oplossing

L x B = 750cm² en dus is L = 750cm² / B                (1)
L x H = 600cm² en dus is H = 600cm² / L                (2)
B x H = 500cm² en dus is H = 500cm² / B                (3)

(2) = (3) en dus is 600cm² / L = 500cm² / B of 6B = 5L
Stoppen we daar (1) in: 6B = 5 x 750cm² / B
Of 6B² = 3750cm² / 6 waaruit B = 25cm
L = 6/5B en dus is L = 30cm(2) levert H = 600cm² / L of H = 20cm
Tot vrijdag.