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**How do I calculate the diameter of a cyclinder using F= P x A ??**

I need to be able to state the diameter of a pneumatic cyclinder using F= P x A

I have the following given information;

This is a lift with the required force being 2000 Newtons.

The pressure applied to the system is 2.5N/mm2

So I need an answer to the calculated diameter of the cyclinder required to make the lift work from the given inforation.

What do I need to do with the 2.5N/mm2 ? Do I need to use 3.4 (∏) to times the 2.5?

Thanks, Wayne