find the total surface area of a cube whose side is 20 cm
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Given : a Cube whose side is 20 cm.
To Find : total surface area of a Cube
Solution:
total surface area of a Cube = Sum of Surface area of each Face
A cube has all sides equal
Hence Surface area of one face = Side²
=> Surface area of one face = 20²
=> Surface area of one face = 400 cm²
A cube has 6 faces
Hence Total Surface Area = 6 x Surface area of one face
=> Total Surface Area = 6 x 400
=> Total Surface Area = 2400 cm²
total surface area of a Cube whose side is 20 cm. is 2400 cm²
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