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3.Find the side of a cube whose surface area is \(600 cm^2\)?
Answer :

Given, the surface area of cube is \(600 cm^2\)
Total surface area of a cube =\( 6l^2\)

\(\Rightarrow 6l^2 = 600\)

\(\Rightarrow l^2 = 100\)

\(\Rightarrow l = \sqrt{100} = 10 cm\)

Hence, the required length of side = 10 cm.