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4.In a stack there are 5 books each of thickness 20 mm and 5 paper sheets each of thickness 0.016 mm. What is the total thickness of the stack?


Answer :

We have the thickness of books = \(5 \times 20 = 100 mm\)

Also, the thickness of 5 paper sheets = \(5 \times 0.016 mm = 0.080 mm\).

Total thickness of the stack = \(100 mm + 0.080 mm = 100.080 mm = 1.0008 \times 10^2 mm\)

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