, assuming they mean pre eat values.
2. 
15x^2 = 12x
divide each side by x
15x = 12
now divide each side by 15
x = 12/15 or 4/5 which is also 0.8
Tan(61)= x/16 --> 16 x tan(61) = 59.89 = 59.9
Answer:
492,630
Logic is the only explanation I have for you...
The answer is 2.1 if the height of the cylinder