Answer:
The height h = 12.87 cm.
Step-by-step explanation:
Volume = pi r^2 h
647 = pi 4^2 h
h = 647 / 16pi
h = 12.87 cm.
edc
I think because those all connect
assuming you meant (3/4)/(2/5)
15/8 or 1 7/8
use a calculator
D