Question

In a stck there are 5 books each of thickness 20mm and 5 paper sheets of thickness 0.016mm. What is the total thickness of the stack? (1mm = 0.001m) [3 MARKS]

Answer 1

Steps: 1 Mark
Application: 1 Mark
Answer: 1 Mark

Thickness of each book $=20mm$

Hence, thickness of 5 books $=5\times 20=100mm$

Thickness of each paper sheet $=0.016mm$

Hence, thickness of 5 paper sheets $=5\times 0.016=0.080mm$

Total thickness of the stack

= Thickness of 5 books + Thickness of 5 paper sheets

$=(100+0.080)mm$

$=100.08mm$

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