Question

The thickness of a dozen coins on a metre scale was found to be $18cm$. What is the thickness of one coin?

• A. $15cm$
• B. $1.2cm$
• C. $1.8mm$
• D. $15mm$

Answer 1

The correct option is D $15mm$

The thickness of a dozen coins (12) $=18cm$.
The thickness of one coin
$=\frac{18}{12}$ $=1.5cm$
$1.5cm=1.5\times 10=15mm$