Question

The thickness of a dozen coins on a metre scale was found to be $24cm$. What is the thickness of one coin (in $mm$)?

• A. 20

Answer 1

The correct option is A 20
The thickness of a dozen coins (12) $=24cm$.
The thickness of one coin
$=\frac{24}{12}$ $=2cm$
$2cm=2\times 10=20mm$