Question

A body weighs 50 ounce. It’s weight in kg will be
A. $1.415$
B. $1.359$
C. $1.258$
D. $1.123$

Answer 1

Hint: It is to be solved by applying the concept of conversion of units from one system to another.Also we have to remember that what is the value of one ounce in grams.

Complete step by step answer:
The ounce is actually a name for several units of mass, volume or weight.
But here we have to convert an ounce in kg which is units of mass. So, the word ounce here is used for mass.
One ounce is one sixteenth of a pound or $28.349$ grams.
$1$ ounce $ = $ $28.349$ gm
$1$ ounce $ = $ $0.0283$ kg
So, $50$ ounce $ = $ $50 \times 0.0283$ kg
 $ \implies 1.415 Kg $

So, the correct answer is “Option A”.

Additional Information:
The word ounce is used in most British derived customary systems of measurements.
The avoirdupois ounce which is used for a mass of $28.3$ g is primarily used in the United States for measuring packaged foods, postal items, boxing gloves and many more.
Beside common ounce, several other ounces in current use are as follows;
A troy ounce of $31.103$ grams is used for measuring mass of precious metals such as gold, silver, platinum etc.
An ounce – force is to measure the force. It is \[\dfrac{1}{{16}}\] of a pound force or $0.278$ Newtons.
A fluid – ounce is used to measure the volume which is equal to $28.4$ ml in the imperial system and about $29.6$ ml in the US system.

Note:
Remember the values of one ounce in grams. While solving this question, apply the conversion of D ounce mass to kg and don't use other units.