Question

Joe ordered 20 chocolate boxes for his birthday party. If each chocolate box weighs 45 grams 20 centigrams, find the total weight of all the chocolate boxes ordered by Joe.

• A. 900 grams
• B. 904 grams
• C. 90.4 grams
• D. 90.04 grams

Answer 1

The correct option is B 904 grams

Weight of 1 chocolate box = 45 g 20 cg
$\text{∴ Weight of 20 such boxes}=45\text{g}20\text{cg}\times 20$

Now, multiplying the units separately, we get:


$\text{Weight of 20 chocolate boxes}=900\text{g}400\text{cg}$
$\text{Now,}1\text{g}=100\text{cg}$

Converting centigram to gram, we see:
$100\text{cg}=1\text{g}$
$\Rightarrow 400\text{cg}=\frac{400}{100}\text{g}=4\text{g}$

So, total weight of 20 chocolate boxes
$=900\text{g}+4\text{g}=904\text{g}$