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Pole powierzchni całkowitej prostopadłościanu jest równe:
2*6*8 + 2*6*h + 2*8*h = 184
96+ 28h = 184
28h = 88
184=2(6*8+8h+6h) I:2
92=48+14h
92-48=14h
44=14h I:14
h= 44/14
h= 3 2/14
h = 3 1/7