Option B is correct. The amount of kg the crate contains is approximately 724kg
Measurement is a means of measuring a quantity of an object.
If a crate contains 25,500 ounces (oz) of rice, this means that:
1crate = 25,500 ounces
Convert 25,500 ounces to pounds(lb)
Since 1 lb = 16 oz
x = 25,500 oz
Cross multiply
16x = 25,500
x = 25,500/16
x = 1,593.75lb
Since we need to know the number of kg it contains, we will also need to convert 1,593.75lb to kg as showns:
Recall that;
1 lb = 0.454kg
1,593.75lb = y
Cross multiply again
y = 0.454 * 1593.75
y = 723.56kg
y ≈ 724kg
Hence the amount of kg the crate contains is approximately 724kg
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We need to perform a change of units. We always can do this only if both units represent the same measure, like in this case, both of them represent mass.
We will find the equivalence: 25,500 oz = 723.56 kg
We know that the crate contains 25,500 oz of rice.
We want to transform this quantity to kilograms, knowing that:
1 lb = 16 oz
1 lb = 0.454 kg
Then we first need to transform to pounds, and then to kilograms.
Using the first relation we can write:
1 = (1 lb)/(16 oz)
We can multiply our original measure by this (this is equal to 1, so it does not modify our measure, only changes the units).
25,500 oz = 25,500 oz*(1 lb)/(16 oz) = 1,593.75 lb
Now we can use the second relation to write:
1 = (0.454 kg)/(1 lb)
Now we need to multiply the above measure by this:
1,593.75 lb = 1,593.75 lb*(0.454 kg)/(1 lb) = 723.56 kg
Then we have:
25,500 oz = 723.56 kg
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