Question

A newborn baby weighs 7.5 lbs. How many grams is that?

Answer 1

Hint: It is given that the newborn baby weighs 7.5 lbs and we are asked to convert the given weight into grams. Firstly, we need to write the conversion for unit lbs into grams and then use the unitary method to find for 7.5 lbs. After the conversion, we write the converted value along with the unit, grams.

Complete step-by-step solution:
Given that the newborn baby weighs 7.5 lbs.
We have been asked to convert this weight which is given in lbs to grams.
The two units lbs and grams are used to denote a unit of mass or weight in the metric system.
The unit lbs are also known as pounds.
Let us now see the relationship between pounds and grams.
It is given by the standard metric system that,
1 pound = 453.592 grams
Now we use the unitary method to find the value of 7.5 lbs in grams.
Which can be written in unitary method form as,
1 pound -- 453.592 grams
7.5 pounds -- $?\;$grams
So here we perform cross-multiplication as used in the unitary method and then we simplify the expression to get the value of 7.5 lbs in grams.
On Cross multiplying we get,
$\Rightarrow \dfrac{7.5\times 453.592}{1}$
On evaluating we get,
$\Rightarrow 3401.94$ grams.
Hence, the weight of the newborn baby when converted from lbs to grams or pounds to grams we get 3401.94 grams.

Note: Never forget to write the units of the given quantity after the whole evaluation. Units are what give the quantity, the recognition and identity. Whenever there are more zeros in the end, we can write it in powers of $10\;$ to reduce space and time.