Question

Паша, Яша и Вася ели пиццу. За первый час Паша съел 50% пиццы, а Яша и Вася вместе за это же время съели кусок пиццы массой 100 граммов. За следующий час Паша съел 60% от оставшейся пиццы, а Яша и Вася съели кусок пиццы массой 175 граммов на двоих. В итоге осталось 75 граммов пиццы. Выразите 0.4 килограмма в миллиграммах. Ответ округлите до целых.(Число) Какова была масса пиццы? Ответ выразить в граммах, округлив до целых.(Число) ​

Answer 1

400000 мг
1450 гр пиццы
0,5x+100+0,6(0,5x-100)+175=x-75
Как-то так

Answer 2

Ответ:

1450 гр пиццы

Объяснение:

0,5x+100+0,6(0,5x-100)+175=x-75

Answer 3

Calculation of Pizza Mass

To solve this problem, let's break it down step by step.

1. In the first hour, Pasha ate 50% of the pizza, while Yasha and Vasya together ate a piece of pizza weighing 100 grams. 2. In the second hour, Pasha ate 60% of the remaining pizza, while Yasha and Vasya together ate a piece of pizza weighing 175 grams. 3. In the end, there were 75 grams of pizza left.

To find the total mass of the pizza, we need to work backward from the remaining 75 grams.

Let's denote the initial mass of the pizza as M.

In the first hour: - Pasha ate 50% of the pizza, which is equal to 0.5 * M. - Yasha and Vasya together ate a piece weighing 100 grams.

So, the remaining pizza after the first hour is M - (0.5 * M) - 100 grams.

In the second hour: - Pasha ate 60% of the remaining pizza, which is equal to 0.6 * (M - (0.5 * M) - 100) grams. - Yasha and Vasya together ate a piece weighing 175 grams.

So, the remaining pizza after the second hour is M - (0.5 * M) - 100 - (0.6 * (M - (0.5 * M) - 100)) - 175 grams, which is equal to 75 grams.

Now, we can solve this equation to find the value of M.

M - (0.5 * M) - 100 - (0.6 * (M - (0.5 * M) - 100)) - 175 = 75

Simplifying the equation:

M - 0.5M - 100 - 0.6(M - 0.5M - 100) - 175 = 75

0.4M - 0.6(0.5M - 100) - 275 = 75

0.4M - 0.3M + 60 - 275 = 75

0.1M - 215 = 75

0.1M = 290

M = 290 / 0.1

M = 2900 grams

Therefore, the mass of the pizza was 2900 grams.

To express 0.4 kilograms in milligrams, we can convert it using the fact that 1 kilogram is equal to 1,000,000 milligrams.

0.4 kilograms = 0.4 * 1,000,000 = 400,000 milligrams.

So, 0.4 kilograms is equal to 400,000 milligrams.