Question

Cereal costs \[\$4.50\] for \[2pounds\] . How much does it cost per $ounce$ ?

Answer 1

Hint: before solving this problem we should be aware of following terms.
Pound: it is a unit of mass. It is used in the imperial, United States customary as well as other systems of measurement.
It is defined as, $1lb = 0.45359237kg$ .
 $lb$ is it’s unit.
Ounce: it is a unit of mass. It is a United States customary and British imperial ounce.
It is defined as, $1ounce = \dfrac{1}{{16}}lb$ .

Complete step by step solution:
As given in question Cereal costs \[\$ 4.50\] for $2pounds$ .
So, the cost for $1pound = \dfrac{{\$ 4.50}}{2} = \$ 2.25$ .
As, $1pound = 16ounce$ .
So, we can get
Cereal cost for $16ounce = \$ 2.25$ .
Hence, Cereal cost for $1ounce = \dfrac{{\$ 2.25}}{{16}} = \$ 0.140625$ .
So as we get Cereal cost for $1ounce$ will be \[\$0.140625\] .

Note: to measure mass there are alot of units used like kilogram, gram, pounds, ounce. There is an SI unit which is world wide accepted and it is used in measure of quantity when traction is taking place between different countries. SI unit for mass is $kg$. Mass is a basic term but we rarely use it; we use weight in daily life traction.