
Volume Problem
How many jam tins can fit into this box if they have a diameter of 8cm and are 11cm high?
I have worked out the volume of the box to be and the volume of the tin to be .
When I divide the box by the cans, I get cans.
But the answer should be 30 cans. What have I done wrong?

Hello Demonstration
Welcome to Math Help Forum!You don't tell us what the dimensions of the box are. But have you taken into account the spaces in between the tins? If they are cylindrical (as I assume they are) then you can't pack them into the box without 'wasting' some space, can you?
Grandad

Assuming the box is specially designed for packing tins:
You must know that cylinderical things will not fit perfectly into square things.
So, using the volume formula of a cylinder is useless. Instead, assume the tins aren't round, but like a block, rectangular block.
Therefore:
Now the volume of the box is 21120 so...

Hi, sorry, I was given a diagram and I forgot to mention the dimensions.
The dimensions are .
But what you're saying about wasted space makes perfect sense.
So if I packed 5 in a row, with 2 rows, and 3 layers, that makes 30 cans.
I get it now, thanks.