Can anyone help me for this question?

[Mathkiller]

Hello guys.. please help me to settle this..

1. choose a product, model the shape or outline of the chosen product using single or multiple variables function.

2. find cross-section and volume of the product and verify your answer with yor actual/real product..

This is my Outline Shape :

[Mathkiller]

i want to find and equation of every curves of outline shape.
then after that i must integrate the equation that i get..
after all of this, i must calculate volume..

now, i'm stuck to find an equation..
can anyone help me..