SOLUTION: The total surface of two cubes is 150 sq. m, The total length of their edges is 84 cm. Find the edge of the larger cube.

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Question 926242: The total surface of two cubes is 150 sq. m, The total length of their edges is 84 cm. Find the edge of the larger cube.
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
x small cube edge, y large cube edge.

6x%5E2%2B6y%5E2=150 and 8x%2B8y=84.
Can you find how these two equations make sense?

Six sides per cube, and 8 edges per cube.

Simplify each equation.
x%5E2%2By%5E2=25 and 2x%2B2y=21.
You can solve this simplified system. Any trouble?