The cube

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

Correct result:

S1 =  25 cm2
a =  5 cm

Solution:

S=150 cm2 S=6 S1  S1=S/6=150/6=25 cm2
S1=a2 a=S1=25=5 cm



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