Question

how tall is a stack of 100 pennies in centimeters

Answer 1

A stack of 100 pennies, one on top of the other, is 15.5 centimeters tall.

According to the US Mint, a penny is 1.55 mm thick, therefore a stack of
100 pennies would be 155 mm thick or 15.5 centimeters.

This means that a stack of 100 pennies is 6.1 inches in height.

Answer 2

Answer: The height of the stack of 100 pennies is 190 cm.

We know that:

The height of a penny is = 1.9 cm.

So the height of the stack of 100 pennies is = $(100*1.9)=190$ cm.

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