There is no sensible answer to this question. A square foot is a measure of area, with dimensions [L2]. However, the dimensions of the silo are those of a volume [12 feet round by 55 ft tall], with dimensions [L3]. Basic dimensional analysis teaches that you cannot convert between measures with different dimensions without additional information.
12 inches
If you are 12 years old and you are 163 cm tall and weigh 55 kg, it is not too much. This height and weight are considered normal for a boy or girl of 12 years old.
Anywhere from 55-65 lbs is a healthy weight.
55 * 12 = 660
6.6 is 12% of 55
55 - 12= 43
55 x 12 = 660
The LCM of 12 and 55 is 660.
67
I'm 12 and 5'6 and I weigh 46. But my tall friend is also 12 but weighs 73kg. But it matters how tall you are. So the average for 12 is 40-55 ( that's what it said on a chart) but don't worry if your over.
If 12p + 4q = 55, then p = (55 - 4q)/12
55.0