A rock has a density of 17 gm/cc. If it is cut into 3 equal pieces, what will be the dencity of each peice?
Follow Math Help Forum on Facebook and Google+
Density is defined as Mass divided by Volume. It's a ratio. So, when the rock is cut into 3, does that ratio change for any of the three pieces?
No, the ratio doesn't change, but I don't know how to express it in a formula.
So when the rock is cut into three equal pieces, the mass and volume are also cut into three equal pieces:
Remember that to divide fractions you flip and multiply. So:
View Tag Cloud