Find the volume of a cube one face of which has an area of 81 m square
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ANSWER:
Area of the face which is a square =a^2=81.
==>a=9m.
==>volume of cube =a^3.
==>volume of cube =9^3.
==>volume of cube=729m^3.
Area of the face which is a square =a^2=81.
==>a=9m.
==>volume of cube =a^3.
==>volume of cube =9^3.
==>volume of cube=729m^3.
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area = 81 m
81m= x times x
x = 9 m
volume of cube= side times side times side
9 times 9 times 9
= 729 meters
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