Bennie is calculating the density of books in a box. He knows the number of books in the box and the volume of the box. Which of the following formulas can be used to calculate the density of books in the box?

Density = number of books over volume of shelf
Density = volume of shelf over number of books
Volume of shelf = density over number of books
Number of books = density over volume of shelf

Question

Bennie is calculating the density of books in a box. He knows the number of books in the box and the volume of the box. Which of the following formulas can be used to calculate the density of books in the box?

 Density =  number of books over volume of shelf
 Density =  volume of shelf over number of books
 Volume of shelf =  density over number of books
 Number of books =  density over volume of shelf

anonymous · Answer

Volume of shelf over number of books

qwertty123 · Answer

Density= Mass/Volume Is what you get...I think..

ishipdestiel · Answer

could you explain this to me, I dont know how to do this, I thought it was A

welshfella · Answer

the density  is described as  'number of books per unit volume'

so what do you thin?  what divides what?

welshfella · Answer

*think

qwertty123 · Answer

Oh sorry.. Yeah I can explain though @welshfella did a great job at describing it! :D

welshfella · Answer

ty  The asker was right .  It is A.

qwertty123 · Answer

You welcome! XD Yeah it is A. Density =  number of books over volume of shelf Nice Job @IshipDestiel

anonymous · Answer

So youre saying that if the volume of shelf is $$27cm ^{3}$$ and there are 9 books then the 
density will be $$\frac{ 9 }{ 27 }$$

anonymous · Answer

wont the density be $$\frac{ 27 }{ 9}$$

ishipdestiel · Answer

Thank you everyone for helping me. :D