Question

in a stack there are 5 books each of thickness 20mm ans 5 paper sheets each of thickness 0.016mm what is the total thickness of the stack
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Answer 1

Answer::

Total number of books in the stack=5

thickness =20mm

Total thickness of the book =20×5=100

Total number of paper =5

thickness of the paper =0.016mm

Total thickness of the paper =5×0.016=0.080

Total thickness of the stack

=100+0.080=100.080=1.0008×10² mm

Answer 2

Answer:

$1book = 20mm \\ 5books =( 20 \times 5)mm \\ = 100mm \\ \\ 1paper \: sheet = 0.016mm \\ 5paper \: sheet = (0.016 \times 5)mm \\ 0.08mm \\ total \: thickness = 100mm + 0.08mm \\ 100.08mm \\ 1.0008 \times {10}^{2}$

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