# math

posted by .

540 kg of dry concrete mixture is to be spread over three surfaces in the ratio equal to that of their areas.If their areas are 9 square m,11 square m and 16 square m,how much is used on each surface?

• math -

9+11+16 = 36
9/36 = 1/4 = .25
11/36 = .306
16/36 = .4444

,25 * 540 = 135
.36 * 540 = 165
.4444 * 540 = 240

## Similar Questions

1. ### math

a house has two rooms of equal area. one room is square and the other room a rectangle, four feet narrower and 5ft longer than the square one. find the area of each room?
2. ### math

A square and a rectangle have equal areas. The length of the rectangle is 9 cm longer than the side of the square and the width of the recangle is 6 cm shorter than the side of the square. How long is the side of the square?
3. ### math

if a triangle with square attached have areas of 6 square units for the smallest square and 10 square units for the largest square, what is the missing area?
4. ### math

a rectangle has the length twice the side of this square and width three units less than the side of this square. if the two areas are equal, what are the squares dimensions (w * h)?
5. ### math

Please help I'm so confused!!!! 1. Which two square roots are used to estimate the square root of 5?
6. ### math

the perimeter of two square are 848cm and 436cm find the perimeter of square whose area is equal to the sum of areas of two square.
7. ### Math

If the ratio of the areas of two squares is 8:25 and the side of the smaller square measures 28 cm, find the area of the bigger square?
8. ### Geometry

Points X, Y, and Z are on sides AB, BC, and CD, respectively, of square ABCD. Let O be the intersection of the diagonals of ABCD. Segments XO , YO, and ZO divide the square into three parts with equal areas. If Y is the midpoint of …
9. ### Math

The areas of two squares are in the ratio 9:16. The smaller square has sides of length 15cm. Calculate the size of the length of the larger square.
10. ### Math

Two squares are drawn. The larger square has area of 400 square inches. The areas of the two squares have a ratio of 1 : 4. What is the side length s of the smaller square?

More Similar Questions