Answer:
[tex]v olume= \frac{1}{3} \times \: height \times surface \\ 1594.5 = \frac{1}{3} \times {x}^{2} \times 15.8 \\ {x}^{2} = (1594.5 \times 3) \div 15.8 = 302.753 \\ x = 17.399[/tex]