Explain the law of variable proportions with the help of a schedule and a diagram.

This ​topic is explained in detail in our study material. You can refer to the same following the below mentioned path.
Chapter-3 (named as 'Production and Costs' )- Lesson-3 (named as 'Law Variable Proportions and Law of Diminishing Marginal Product - Returns to a Factor')-under the topic 'Law of Variable Proportions'