Question

In a stack, there are 10 books each of thickness 50 mm and 15 paper sheets each of thickness 0.012 mm. What is the total thickness of the stack? Express the final thickness of stack in cm. [3 MARKS]

Answer 1

Concept: 1 Mark
Application: 2 Mark

Thickness of each book = 50 mm

Thickness of 10 books $=(50\times 10)mm$

$=500mm$

Thickness of each paper sheet $=0.012mm$

​​​​​​Thickness of 15 paper sheet $=(0.012\times 15)$

$=0.18mm$

Total thickness of the stack = Thickness of books + thickness of papers = (500 + 0.18) mm
= 500.18 mm
$=(500.18÷10)cm$
= 50.018 cm