Question

fresh fruit contain 90% water while dry fruits contain 20% water. How many kilograms of fruits do you need to take to get 3kg of dry fruits?​

Answer 1

Возможно, имеется в виду задача:

Свежие фрукты содержат 95% воды, а высушенные - 22%. Сколько сухих фруктов получится из 858 кг свежих фруктов?

Решение:

Вычислим сухую часть в свежем фрукте: 1-0.95=0.05

Вычислим массу сухой части: 858*0.05=42.9 кг

Вычислим сухую часть в высушенном фрукте: 1-0.22=0.78

Вычислим полную массу высушенных фруктов: 42.9/0.78= 55 кг

Ответ: 55 кг.

Если задача не та, реши по примеру

Answer 2

To determine the amount of fresh fruits needed to obtain 3 kg of dry fruits, we can set up a proportion based on the water content:

Water content in fresh fruits / Water content in dry fruits = Total weight of fresh fruits / Weight of dry fruits

Let's solve for the total weight of fresh fruits:

90% / 20% = Total weight of fresh fruits / 3 kg

Converting the percentages to decimal form:

0.9 / 0.2 = Total weight of fresh fruits / 3 kg

Simplifying the equation:

4.5 = Total weight of fresh fruits / 3 kg

To isolate the total weight of fresh fruits, we can cross-multiply and solve for it:

Total weight of fresh fruits = 4.5 × 3 kg Total weight of fresh fruits = 13.5 kg

Therefore, you would need to take approximately 13.5 kilograms of fresh fruits to obtain 3 kilograms of dry fruits.