math
posted by vero .
The shape of the shell resembles a cone with an approximate diameter of 21 mm and an approximate height of 38 mm.
What is the approximate volume of the shell? (Use 3.14 for .)

r=radius=21/2=10.5 mm
h=height=38mm
V is in mm³
Volume of a cone, V
= (1/3)πr²h
=(1/3)*3.14*10.5²&38 mm³
=4385 mm³