If the thickness of a pile of 12cardboard is 6.5mm find the thikness of a pile of 312such cardboard
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thickness of 12 cardboards =6.5
thickness of 1 cardboard =6.5/12
thickness of 312 cardboards =6.5/12×312
=169mm
thickness of 1 cardboard =6.5/12
thickness of 312 cardboards =6.5/12×312
=169mm
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