If the total surface area of a cube is
864 cm, find its lateral surface area.
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tsa =864 cm^2
6a^2=864
a^2=864/6
=144
a=12
lsa=4a^2=4×144= 576cm^2
6a^2=864
a^2=864/6
=144
a=12
lsa=4a^2=4×144= 576cm^2
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