the perimeter of one face of a cube is 20 cm. find its surface area
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Answer:
150 cm^2
Step-by-step explanation:
the perimeter of one face of cube = 20 cm
4 (a) = 20 cm
a = 20 / 4
a = 5 cm
one side of the cube is 5 cm
total surface area of the cube = 6 (a)^2
= 6 x ( 5 )^2
= 6 x 5 x 5
= 150 cm^2
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