Question

Собрали 42 кг свежих грибов, содержащих по массе 95% воды. Когда их подсушили, они стали весить 3 кг. Каков процент содержания воды в сухих грибах?

Answer 1

Сухого вещества в 42 кг свежих грибов
100-95=5%
5% от 42 кг = 42:100*5=2,1 кг
В 3 кг сухих грибов сухого вещества 2, 1 кг, остальное - вода.
3-2,1=0,9 кг воды.
3-100%
0,9 -х
3х=90%
х=30%

Answer 2

Calculation of Water Content in Dried Mushrooms

To calculate the percentage of water content in dried mushrooms, we need to determine the initial weight of the fresh mushrooms and the weight of the mushrooms after they have been dried.

Given: - Weight of fresh mushrooms: 42 kg - Water content in fresh mushrooms: 95% - Weight of dried mushrooms: 3 kg

To find the water content in dried mushrooms, we can use the following formula:

Water content in dried mushrooms = (Weight of fresh mushrooms - Weight of dried mushrooms) / Weight of fresh mushrooms * 100

Substituting the given values into the formula, we get:

Water content in dried mushrooms = (42 kg - 3 kg) / 42 kg * 100

Calculating the equation:

Water content in dried mushrooms = 39 kg / 42 kg * 100

Simplifying the equation:

Water content in dried mushrooms = 0.9286 * 100

Therefore, the water content in the dried mushrooms is approximately 92.86%.

Please note that the accuracy of the result is limited by the precision of the given values and the calculations performed.