The base of the bath is 3 feet by 9 feet which gives an area of 27 square feet.
Yes
not enough info to answer the question
Not enough dimensions to tell.
40
a typical master bathroom is 15X17. depending on tub size.
That depends on the house and the master bedroom in question. There is no fixed size, any bedroom can be designated as the "master bedroom" - it is a marketing term, not a specific building code.
3 square meters equals 32.29 square feet. That is not a house size. Not even a room size. It is large enough for a small bathroom or a fairly large closet.
If a bathroom has a total area of 27 square feet and a length of three feet, the width most be nine.
Oh, perhaps 40 to 50 square feet on up, depending on whether it has two lavs or a Jacuzzi bathtub, and so forth. When I was growing up, our bathroom was about 90 to 100 square feet. You could have held a square dance.
no
There is no international standard size.
144 square feet (12 X12) is normal for all except the master bedroom. Master bed room is more like 250 - 300 square feet.
40 square feet
300 square feet
The base of the bath is 3 feet by 9 feet which gives an area of 27 square feet.
About the size of a typical house bathroom