Question

Капуста массой 3 кг содержит 90% воды.когда капуста немного усохла, содержание воды в ней стало 85% .какова последняя масса капусты?

Answer 1

90-85=5%.
значит капуста усохла на 5%
3кг-5%=2,85кг (конечный вес капусты)

Answer 2

3*0,9=2,7 кг воды в капусте

90-85=5% стало меньше воды, что весе воды испарилось=2,7*0,05=0,135 кг

3-0,135=2,865 кг последняя масса капусты

Answer 3

Calculation of the Final Mass of the Cabbage

To calculate the final mass of the cabbage, we need to use the information provided.

According to the question, the cabbage initially had a mass of 3 kg and a water content of 90%. After it dried out a bit, the water content decreased to 85%. We need to find the final mass of the cabbage.

Let's assume the final mass of the cabbage is x kg.

To solve this problem, we can set up the following equation:

(100% - 85%) * x = 90% * 3 kg

Simplifying the equation, we have:

15% * x = 90% * 3 kg

Now, we can solve for x:

x = (90% * 3 kg) / 15%

Calculating the right side of the equation:

x = (0.9 * 3 kg) / 0.15

x = 5 kg

Therefore, the final mass of the cabbage is 5 kg.

Please note that the calculation assumes that the mass of the cabbage is directly proportional to the water content.