Question

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

Answer 1

Thickness of $1$ book $=20$ mm

Thickness of $5$ book $=20\times 5=100$ mm --------------(i)

Thickness of $1$ paper $=0.016$ mm

Thickness of $5$ paper $=0.016\times 5=0.08$ mm ---------(ii)

Total Thickness = (i) + (ii)

$=(100+0.08)$ mm

$=100.08$ mm

$=1.0008\times {10}^2$ mm