27
simple.
A 6 x 9 inch oval is a 3 inch x 3 inch square with a semicircle of 3 inch radius at each end. The total area is, therefore, 9 + 9*pi = 27.3 sq inches. Note that an oval is NOT an ellipse.
9 x 13 = 117 square inches
a 9 x 13= 117 sq inches; if each serving is 3 x 3 inch you can get 117/9 = 13 servings
To calculate the square inchec, multiply one side by the other. For example, in a 3 x 9 inch square, multiply 3 x 9, which gives you 27 square inches.
no .of bricks = area of room /area of bricks area of room = 9 X12 X12 X12 inches ( 1 foot =12 inches ) area of bricks =3 X8 no.0f bricks =9 X12 X12 X12 inches /3 X 8 =648
no .of tiles = area of room /area of tiles area of room = 9 X12 X12 X12 inches ( 1 foot =12 inches ) area of tiles =3 X8 no.0f tiles =9 X12 X12 X12 inches /3 X 8 =648
1 sq foot = 144 sq inch 3 inch x 3 inch = 9 sq inch = 9/144 sq feet = 0.0625 sq feet
8 inch x 16 inch concrete block is actually 2/3 foot x 4/3 foot block Area of one block is 2/3 x 4/3 = 8/9 square feet Number of blocks in 310 square feet = (310)/(8/9) = (310) x (9/8) = 155 x 9/4 which is 1395/4 = 348.75 blocks
area of object = l* b = 9 X 34 =306 inch ^2
9 inches x 9 inches = 81 one inch servings
16 x 16 inch tiles are actually (1 and 1/3) x (1 and 1/3) feet tiles which turns out to have an area of (4/3) x (4/3) = 16/9 square feet. So you want to cover 80 square feet. The number of tiles required is (80) / (16/9) = (80) x (9/16) = 45 tiles
The bulk of the question is irrelevant ! If all you need is the surface area of the 3-inch cube, simply multiply 3 x 3 x 6 to give 54 square inches !