Cube wall

Surface of first cube wall his 225 mm2.
Second cube area is 60% of the surface of the first cube. Determine the length of the edge of the second cube (x).

Correct result:

x =  11.6 mm

Solution:

x=225⋅60100=11.6 mmx = \sqrt{ 225 \cdot \dfrac{ 60}{100}} = 11.6 \ \text{mm}

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