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Question

Find the surface area of a cube whose volume is
(i) 343 m3
(ii) 216 dm3

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Solution

(i)Volume of the given cube=343 m3 We know that volume of a cube=(side)3(side)3=343 i.e., side =3433=7 m Surface area of the cube=6×(side)2=6×(7)2=294 m2(ii)Volume of the given cube=216 dm3 We know that volume of a cube=(side)3(side)3=216 i.e., side=2163=6 dm Surface area of the cube=6×(side)2=6×(6)2=216 dm2

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