Which is more dense -- A stack of 20 NT coins or a stack of 5 NT coins

A stack of 20 NT coins would be denser than a stack of 5 NT coins. This is because to find the density of an object, you have the mass divided by the volume. The mass of the 20 NT coin stack would be more than the mass of the 5 NT coin stack. The volume would be different too because there are more coins in the 20 NT stack than the 5 NT stack. Thus, the data in the density formula would be different and the stack of 20 NT would be more dense because it has more coins than the other stack.