One dozen coins were arranged one above the other. Their total height was 6cm 6mm. The thickness of each coin is

Options

A. 6.4mm
B. 6.6mm
C. 5.5mm
D. None of these

Answer

To find the thickness of each coin when one dozen coins are arranged one above the other with a total height of 6 cm 6 mm, follow these steps:

### Step 1: Convert the total height into a single unit
The total height is given as 6 cm 6 mm. We need to convert this into millimeters for easier calculation.

1 cm = 10 mm

So, 6 cm = 6 × 10 mm = 60 mm.

Now, add the additional 6 mm:

Total height = 60 mm + 6 mm = 66 mm.

### Step 2: Determine the number of coins
One dozen coins means there are 12 coins.

### Step 3: Calculate the thickness of each coin
To find the thickness of each coin, divide the total height by the number of coins:

Thickness of each coin = Total height / Number of coins

Thickness of each coin = 66 mm / 12

### Step 4: Perform the division
Now, calculate the division:

66 mm ÷ 12 = 5.5 mm.

### Conclusion
The thickness of each coin is 5.5 mm.

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