Measuring 6357

Determine the length of the edge of the cube, the surface of which is equal to 60% of the surface of a block measuring 7cm, 8cm, 6cm

Correct answer:

x =  5.4037 cm

Step-by-step explanation:

a=7 cm b=8 cm c=6 cm S1=2 (a b+b c+a c)=2 (7 8+8 6+7 6)=292 cm2  S2=0.60 S1=0.60 292=5876=175.2 cm2  S2=6x2  x=S2/6=175.2/6=5.4037 cm

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