Six pennies (copper coated steel) equal 0,972 cm.
6 cm tall
7.5 cm
The average stack of 5 pennies is 7 mm tall.
There are many countries that use pennies as their minor currency unit and these are of different size. Since you have not bothered to specify which country's currency you intended, it is not possible to give a more useful answer.
The answer is 1,500 centimeters
Six pennies (copper coated steel) equal 0,972 cm.
200 cm
A stack of 10 pennies (US or Canadian) is 1.5 centimeters.
6 cm tall
150 centimeters.
7.5 cm
A centimeter is as tall as a stack of 5 American nickels.
The thickness of the US 1¢ coin is 1.55 mm. 100 of them in a stack rise to a lofty 155 mm = 15.5 cm.
The average stack of 5 pennies is 7 mm tall.
A US penny (US $0.01 coin) is 1.55 mm thick, so multiplying that by 15, a stack of 15 pennies is 23.25 mm or 2.325 cm tall
310m