Question

В первый день собрали 80 кг винограда, что в 2 раза больше, чем во второй. Из всего винограда сделали изюм. Сколько килограммов изюма получилось, если его масса составляет одну четвёртую часть массы всего винограда? Помогите пожалуйста!!! Срочно надо!!! Заранее спасибо!

Answer 1

1. 80:2=40 кг собрали во второй день

2. 80+40=120 кг всего собрали

3. 120*1/4=30 кг изюма получилось

Answer 2

Problem Analysis

We are given that on the first day, 80 kg of grapes were collected, which is twice as much as on the second day. From all the grapes collected, raisins were made. We need to find out how many kilograms of raisins were obtained if their mass is one-fourth of the mass of all the grapes.

Solution

Let's assume that the mass of grapes collected on the second day is x kg. According to the given information, the mass of grapes collected on the first day is twice as much as on the second day. Therefore, we can write the equation:

80 kg = 2x kg

To find the value of x, we can solve this equation:

80 kg = 2x kg

Dividing both sides of the equation by 2, we get:

40 kg = x kg

So, the mass of grapes collected on the second day is 40 kg.

Now, we need to find the mass of raisins obtained. It is given that the mass of raisins is one-fourth of the mass of all the grapes. Therefore, we can write the equation:

Mass of raisins = (1/4) * (Mass of grapes collected on the first day + Mass of grapes collected on the second day)

Substituting the values, we get:

Mass of raisins = (1/4) * (80 kg + 40 kg)

Simplifying the equation, we get:

Mass of raisins = (1/4) * 120 kg

Calculating the value, we get:

Mass of raisins = 30 kg

Therefore, 30 kg of raisins were obtained.

Answer

The mass of raisins obtained is 30 kg.