Question

Question 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 1

Thickness of one book = 20 mm
Thickness of 5 books = 20 $\times$ 5 = 100 mm
Thickness of one paper = 0.016mm
Thickness of 5 papers = 0.016 $\times$ 5
= 0.08 mm
$Totalthicknessofastack=100+0.08=100.08mm$

$=100.08\times \frac{{10}^2}{{10}^2}mm=1.008\times {10}^{2}mm$