The cube

The surface of the cube is 150 square centimeters. Calculate:
a- the content of its walls
b - the length of its edges

Result

S1 =  25 cm2
a =  5 cm

Solution:

S=150 cm2 S=6 S1  S1=S/6=150/6=25 cm2S=150 \ \text{cm}^2 \ \\ S=6 \ S_{1} \ \\ \ \\ S_{1}=S/6=150/6=25 \ \text{cm}^2
S1=a2 a=S1=25=5 cmS_{1}=a^2 \ \\ a=\sqrt{ S_{1} }=\sqrt{ 25 }=5 \ \text{cm}



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