#### Question

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?

#### Solution

Thickness of each book = 20 mm

Hence, thickness of 5 books = (5 × 20) mm = 100 mm

Thickness of each paper sheet = 0.016 mm

Hence, thickness of 5 paper sheets = (5 × 0.016) mm = 0.080 mm

Total thickness of the stack = Thickness of 5 books + Thickness of 5 paper sheets

= (100 + 0.080) mm

= 100.08 mm

= 1.0008 × 10^{2} mm

Is there an error in this question or solution?

Solution 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? Concept: Use of Exponents to Express Small Numbers in Standard Form.