Question

10 coins are placed upon each other. If total height of the stack is $5cm$, what is the thickness of one coin?

• A. $0.1cm$
• B. $0.5cm$
• C. $0.3cm$
• D. $0.2cm$

Answer 1

The correct option is B $0.5cm$

Given:
Number of coins in the stack, $n=10$
Total height of the stack, $H=5cm$

Since, the coins thickness add up to make the height of the stack, the thickness of one coin is given by:
$t=\frac{H}{n}$
$t=\frac{5cm}{10}=0.5cm$