Yes, 90 sq ft is enough for a full master bath - with separate shower and bath. It won't be huge, but certainly sufficient.
To determine how many 18x18 inch tiles are needed for a 42 square foot bathroom, first convert the tile size to square feet. An 18x18 inch tile is 1.5 feet by 1.5 feet, which equals 2.25 square feet per tile. Then, divide the total bathroom area (42 square feet) by the area of one tile (2.25 square feet): 42 ÷ 2.25 = 18.67. Since you can't use a fraction of a tile, you would need 19 tiles to cover the bathroom.
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.
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.
A standard size bathroom typically has dimensions of around 5 feet by 8 feet or 40 square feet.
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
To determine how many 18x18 inch tiles are needed for a 42 square foot bathroom, first convert the tile size to square feet. An 18x18 inch tile is 1.5 feet by 1.5 feet, which equals 2.25 square feet per tile. Then, divide the total bathroom area (42 square feet) by the area of one tile (2.25 square feet): 42 ÷ 2.25 = 18.67. Since you can't use a fraction of a tile, you would need 19 tiles to cover the bathroom.
300 square feet