Question

Please solve this question

Answer 1

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.... as 1 m = 1000 mm
....then , 1 mm = 1/1000 m

● Thickness of a book in the stack

= 30 mm
= 30/1000 m
= 3/100 m
= 0.03 m

:. Thickness of 5 books in stack

= 5 × 0.03 m
= 0.15 m

● Thickness of a paper in stack

= 0.015 mm
= 0.015/1000 m
= 0.000015 m

:. Thickness of 6 papers in stack

= 6 × 0.000015 m
= 0.000090 m

Now, stack contain 5 books and 6 papers
then ,
The thickness of stack

= Thickness of 5 books in stack + Thickness of 6 papers in stack

= 0.15 m + 0.000090 m
= 0.150090 m
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