Hi there,
First please confirm all these with the company. You will have the most accurate answer.
You can expect to have 2 hours to read 40 pages document, Answer 2-3 questions and prepare your 2-3 slides. Then you can have 20 minutes for presentation and Q&A. Typically you should prepare your slides on paper and you are not allowed to use a calculator.
Feel free to reach if you have further questions or if you would like to practice written cases.
Cheers
Serhat