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Q.

A pencil box weighs $225 g .$ The weight of eight such pencil boxes is ____ kg.

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Detailed Solution

Concept: The weight of eight such pencil boxes is 1.8kg. To compute the weight of eight boxes, use a unitary method, which relies on information about a single object to estimate the value of several objects. Add 225g to each box's weight to get its total weight.
to determine the total weight of these pencil cases.
We are aware that a pencil box weighs 225g. The combined weight of eight of these pencil cases must be determined.
We will achieve this by dividing the total number of pencil boxes by the weight of each individual box of paper.
Eight pencil boxes weigh

225 g

each, so eight of them equal 1800g.
Eight pencil cartons each weigh

1800 g .

This weight can also be converted to kilos.
1 kg equals

1000 gram,

as we all know. Consequently, 1g Equals

\frac{1}{1000}

kg.
We shall multiply

x by \frac{1}{1000} t

o convert x gram to kilogram
When

x = 1800

is substituted, we get 1800g=1800

\times \frac{1}{1000}

=1.8kg.
As a result,

1800 g = 1.8 kg .

Hence, eight pencil boxes weigh

1800 g, or 1.8 kg .

ExamType: CBSE

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