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# 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? - CBSE Class 8 - Mathematics

ConceptUse of Exponents to Express Small Numbers in Standard Form

#### 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 × 102 mm

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#### APPEARS IN

NCERT Solution for Mathematics Textbook for Class 8 (2018 to Current)
Chapter 12: Exponents and Powers
Ex. 12.20 | Q: 4 | Page no. 200

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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.
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