Question 1092246
Will start with cubic inches: height is 89 inches and radius is 30 inches, half of 5 feet.
pi*30^2*89 is the in^3 volume, or 251,514 in^3.
There are 1728 in^3 for 1 ft^3, 12^3.  
Therefore, there are 145.55 ft^3.
When there are 32 inches of feed in it, that is 32/89 of the total volume, or 52.33 ft^3.  That means she needs 145.55-52.33 or 93.22 ft^3 of feed.
1 foot is 0.3048 m
1 meter is 1/.3048 or 3.28 feet
1 m^3 is 3.28 ft ^3, or 35.29 ft^3.
93.22 needed/35.29 ft^3 per m^3 is 2.64 m^3.
17.6 or 18 bags (2.64/0.15=17.6) will fill the container to capacity.
Check
Use feet as 7.417 tall with radius of 2.5 feet
pi*6.25*7.417=145.56, so the original volume is correct.
2 feet 8 inches is almost 1/3 of 7 feet 5 inches, so about 2/3 of the feeder should be filled, which is about 2/3 of about 150 ft^3 or about 100 ft^3, which is a little high.