total surface area of cuboid is 300, length 5,breadth 20, height =?
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300=2(5x20xX)
300/2=5x20xX
150=100xX
150-100=X
50=x
Therefore the height is 50
300/2=5x20xX
150=100xX
150-100=X
50=x
Therefore the height is 50
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