Question 883115
The shape is a frustrum.

 
{{{V=((pi*h)/3)(r^2+rR+R^2)}}}

You can substitute the given values and compute volume, V which is in {{{centimeters^3}}}.  You can then simply use 1 kilogram water = 1000 cm^3 water.


r=45
R=50
h=50
Substitute those values.  Find V.