Question

Find the weight of all the books kept in the rack.

• A. 8,000 kg
• B. 8 kg
• C. 800 g
• D. 80,000 g

Answer 1

The correct option is B 8 kg

Number of books in the rack = 50
Weight of each book = 160 g

∴ Total weight of all books = Number of books in the rack × Weight of each book

$\Rightarrow \text{Total weight of books}=160\text{g}\times 50$

Convert the weight of each book to a common measure (g) separately.


So, weight of 50 books = 8000 g

Now, 1 kg = 1000 g
$\Rightarrow 8000\text{g}=\frac{8000}{1000}\text{kg}=8\text{kg}$

So, total weight of 50 books = 8 kg