How many pounds in your luggage you allowed to take on a plane?

Answer 1

Depends entirely on the particular airline. Look at their website for the answer bearing in mind that different classes of ticket (economy, business, first class) often allow different weight limits.
This depends on the airline and sometimes the aircraft; most have an upper limit of around 6 kilograms/13 pounds.

Answer 2

you can only take 40 or 30 pounds