344 На покраску двух стен дома израсходовали 7,26 кг краски. Сколько килограммов краски было израсходовано на каждую стену, если площадь одной из них на 6 м² 2 больше, чем площадь другой, а на каждый квадратный метр требуется 0,22 кг краски?
Q. 344 На покраску двух стен дома израсходовали 7,26 кг краски. Сколько килограммов краски было израсходовано на каждую стену, если площадь одной из них на 6 м² 2 больше, чем площадь другой, а на каждый квадратный метр требуется 0,22 кг краски?
Define Areas: Let's denote the area of the smaller wall as A square meters. Then the area of the larger wall will be A+6 square meters. Since 0.22kg of paint is required per square meter, the total paint used for both walls is 7.26kg.
Set Up Equation: We can set up the equation for the total paint used as follows:0.22×A+0.22×(A+6)=7.26
Simplify Equation: Simplify the equation: 0.22A+0.22A+0.22×6=7.26
Combine Like Terms: Combine like terms: 0.44A+1.32=7.26
Isolate Term with A: Subtract 1.32 from both sides to isolate the term with A:0.44A=7.26−1.32
Calculate Right Side: Calculate the right side of the equation: 0.44A=5.94
Solve for A: Divide both sides by 0.44 to solve for A: A=0.445.94
Find Paint for Smaller Wall: Perform the division to find the area of the smaller wall: A≈13.5m2
Calculate Paint for Smaller Wall: Now we can find the amount of paint used for the smaller wall:Paint for smaller wall = 0.22×13.5
Find Area of Larger Wall: Calculate the paint used for the smaller wall:Paint for smaller wall ≈2.97 kg
Calculate Area of Larger Wall: Next, we calculate the area of the larger wall, which is A+6: Area of larger wall = 13.5+6
Find Paint for Larger Wall: Calculate the area of the larger wall:Area of larger wall = 19.5m2
Calculate Paint for Larger Wall: Now we can find the amount of paint used for the larger wall:Paint for larger wall = 0.22×19.5
Check Total Paint Used: Calculate the paint used for the larger wall: Paint for larger wall ≈4.29 kg
Check Total Paint Used: Calculate the paint used for the larger wall:Paint for larger wall ≈4.29 kgFinally, we check if the total paint used for both walls adds up to the initial total of 7.26 kg:Total paint used = Paint for smaller wall + Paint for larger wallTotal paint used ≈2.97 kg + 4.29 kg
Check Total Paint Used: Calculate the paint used for the larger wall:Paint for larger wall ≈4.29 kgFinally, we check if the total paint used for both walls adds up to the initial total of 7.26 kg:Total paint used = Paint for smaller wall + Paint for larger wallTotal paint used ≈2.97 kg + 4.29 kgCalculate the total paint used:Total paint used ≈7.26 kg
More problems from Find derivatives of inverse trigonometric functions