50 I think hope this helps
.87 is correct you can always check your work with an online calculator. :)
D = 6 inches
r = d/2 = 3 inches
h(water) = 4.2 - 2
h(water) =2.5 inches
volume = pi r^2 h
volume = pi(3)^2 * (2.5)
volume = 71 inch^3
Therefore, D is your answer.
Two yards is equal to six feet, or 72 inches. If you divide 72 by 5, you will get 14.4 inches.
