4. In a stack there are 5 books each of thickness 20mm and 5 paper sheets each of thickness 0.016 mm. What is the total thickness of the stack.
the thickness of each book = 20mm
So, the thickness of 5 books =
the thickness of one paper sheet =0.016mm
So, the thickness of 5 paper sheet =
the total thickness of the stack = (100+0.08)mm
=100.08 mm or