# Sea water

Mixing 62 kg of sea water with 84 kg rainwater is created water containing 3.1% salt. How many percent sea water contains salt?

Result

x =  7.3 %

#### Solution:

$m_{ 1 } = 62 \ kg \ \\ m_{ 2 } = 84 \ kg \ \\ \ \\ p = 3.1 \ \% \ \\ \ \\ p = 100 \cdot \ \dfrac{ \dfrac{ x }{ 100 } \cdot \ m_{ 1 } }{ m_{ 1 }+m_{ 2 } } \ \\ \ \\ p \cdot \ \dfrac{ m_{ 1 }+m_{ 2 } }{ 100 } = \dfrac{ x }{ 100 } \cdot \ m_{ 1 } \ \\ \ \\ p \cdot \ (m_{ 1 }+m_{ 2 }) = x \cdot \ m_{ 1 } \ \\ \ \\ x = p \cdot \ \dfrac{ m_{ 1 }+m_{ 2 } }{ m_{ 1 } } = 3.1 \cdot \ \dfrac{ 62+84 }{ 62 } = \dfrac{ 73 }{ 10 } = 7.3 = 7.3 \%$ Our examples were largely sent or created by pupils and students themselves. Therefore, we would be pleased if you could send us any errors you found, spelling mistakes, or rephasing the example. Thank you!

Leave us a comment of this math problem and its solution (i.e. if it is still somewhat unclear...): Be the first to comment! Tips to related online calculators
Do you have a linear equation or system of equations and looking for its solution? Or do you have quadratic equation?
Tip: Our volume units converter will help you with the conversion of volume units.
Tip: Our Density units converter will help you with the conversion of density units.

## Next similar math problems:

1. A plasticine Jožko modeled from plasticine. He used 27g of plasticine to model a 3 cm long cube. How many grams of plasticine will it need to mold cubes with an edge of 6cm?
2. The schoolyard The schoolyard had the shape of a square with an 11m side. The yard has been enlarged by 75 m2 and has a square shape again. How many meters was each side of the yard enlarged?
3. Diagonal intersect isosceles trapezoid ABCD with length bases | AB | = 6 cm, CD | = 4 cm is divided into 4 triangles by the diagonals intersecting at point S. How much of the area of the trapezoid are ABS and CDS triangles?
4. Octagonal pyramid Find the volume of a regular octagonal pyramid with height v = 100 and the angle of the side edge with the plane of the base is α = 60°.
5. Tetrahedral pyramid Determine the surface of a regular tetrahedral pyramid when its volume is V = 120 and the angle of the sidewall with the base plane is α = 42° 30´.
6. Hexagonal pyramid Please calculate the height of a regular hexagonal pyramid with a base edge of 5cm and a wall height of w = 20cm. Please sketch a picture.
7. Two patches Peter taped the wound with two rectangular patches (one over the other to form the letter X). The area sealed with both patches at the same time had a content of 40cm2 and a circumference of 30cm. One of the patches was 8cm wide. What was the width of t
8. Pilsen Region Between 2000 and 2001, 14 per mille of the population decreased in the Pilsen Region. In 2000, the Pilsen Region had 551281 inhabitants. If the declining trend continues the same (i. E. , 14 per mille of inhabitants per year), how many inhabitants will th
9. Axial section of the cone The axial section of the cone is an isosceles triangle in which the ratio of cone diameter to cone side is 2: 3. Calculate its volume if you know its area is 314 cm square.
10. Cone side Calculate the volume and area of the cone whose height is 10 cm and the axial section of the cone has an angle of 30 degrees between height and the cone side.
11. Length of the edge Find the length of the edge of a cube that has a cm2 surface and a volume in cm3 expressed by the same number.
12. Uboid volume Calculate the cuboid volume if the walls are 30cm², 35cm², 42cm²
13. The aspect ratio The aspect ratio of the rectangular triangle is 13: 12: 5. Calculate the internal angles of the triangle.
14. Two-digit number Digit sum of thinking two-digit natural number is 11. When it exchanging a sequence of digits, given a number which is 27 less than the thinking number. Find out which number I think.
15. The perimeter of the rectangle The length, l, of a rectangle is 4 inches greater than its width, w. The perimeter of the rectangle is at least 30 inches. What inequality shows the range of possible widths of the rectangle?
16. Quotient Find quotient before the bracket - the largest divisor 51 a + 34 b + 68 121y-99z-33
17. The parabolic segment The parabolic segment has a base a = 4 cm and a height v = 6 cm. Calculate the volume of the body that results from the rotation of this segment a) around its base b) around its axis.