Question

# Each surface area of a cube is $$100\ cm^{2}$$. If parallel surface of base cut the cube in two equal parts then total surface area of each equal part.

Solution

## Each face $$=100\ cm^2$$$$a^2=100\ cm^2$$$$a=10\ cm$$Total surface area of each equal part $$=2a^2+4\left(\dfrac{a}{2}\right)^2$$$$=2a^2+\dfrac{4a^2}{4}$$$$=3a^2=3(10)^2=300\ cm^2$$Mathematics

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