The ratio of the big cylinder to small cylinder is: 18 : 9 (given height) So the big cylinder is 2 times bigger than the small cylinder Therefore the radius of the big cylinder is as well 2 times bigger
[tex] \frac{13.06}{2} = r [/tex] r ≈ 6.53 ( the radius of the small radius )
V (of small cylinder) = [tex] \pi [/tex](6.53)²(9) = 1206 in³