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# A pencil box weighs $225g$. How much do eight such pencil boxes weigh?

Last updated date: 17th Mar 2023
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Hint: Use a unitary method to calculate the weight of eight boxes, which determines the value of multiple objects based on the data about the single object. As each box weighs $225g$, multiply $225g$ by $8$ to calculate the weight of all such pencil boxes.

We know that the weight of a pencil box is $225g$. We have to calculate the total weight of eight such pencil boxes.
Thus, we have weight of eight pencil boxes $=225g\times 8=1800g$.
The weight of eight pencil boxes is $1800g$.
We know that $1kg=1000g$. Thus, we have $1g=\dfrac{1}{1000}kg$.
To convert $x$ grams into kilograms, we will multiply $x$ by $\dfrac{1}{1000}$.
Substituting $x=1800$, we have $1800g=1800\times \dfrac{1}{1000}=1.8kg$.
Thus, we have $1800g=1.8kg$.
Hence, the weight of eight pencil boxes is $1800g$ or $1.8kg$.