Find the side of a cube whose surface area is 2400c.m
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we know that the surface area of cube is 6 x square of its length of one side
so , 6×L² = 2400 cm
we will change the side of 6 and we get
L²= 2400÷ 6 as the sign changes with side
∴ L² =400
L = √400
⇒ 20
∴ the side of the cube is 20 cm long .
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