Prism

Three cubes are glued into prism, sum of the lengths of all its edges is 115 cm.

What is the length of one edge of the original cube?

Result

x =  5.8 cm

Solution:

8x+34x=115 20x=115 x=5.8 cm8x + 3 \cdot 4 \cdot x = 115 \ \\ 20 x = 115 \ \\ x = 5.8 \ \text{cm}



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