The answer is B six books, hope this helps!
I believe it’s a trapezoid but i’m not too sure... sorry :((
D = 10 is the diameter so r = d/2 = 10/2 = 5 is the radius
Plug r = 5 and h = 7 into the formula below and simplify
V = pi*r^2*h
V = pi*5^2*7
V = pi*25*7
V = pi*175
V = 175pi
Answer: Choice D
Could you show where is Point H?