Question
A cube has edge 13 m. Find its length of diagonal,
surface area and volume.ÂSolution
Length of diagonal= √(  3 ) a = √(  3 )× 13 = 13√3 Surface area= 6a² = 6 × 13 × 13= 1014m^(2,) Volume of a cube= a³= 13³ = 2197 m^3
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