Question

За 4 дня яхта прошла 800 километров. В первый день было пройдено 30% всего расстояния, во второй день пройдено 5/8 того что в первый день, в третий день пройдено 128% того что во второй день . Сколько километров прошла яхта в четвертый день?

Answer 1

800*0.3=240 км в первый день
240*5/8 = 150 км во 2 день
150*1,28=192 в 3 день
800-240-150-192 =218 в 4 день

Answer 2

Calculation of Distance Covered Each Day

To calculate the distance covered by the yacht on each day, we can use the given information:

- On the first day, 30% of the total distance was covered. - On the second day, 5/8 (or 62.5%) of the distance covered on the first day was covered. - On the third day, 128% of the distance covered on the second day was covered.

Let's calculate the distance covered on each day step by step:

1. Calculate the distance covered on the first day: - Let's assume the total distance covered by the yacht is represented by D. - On the first day, 30% of the total distance was covered, which can be calculated as 0.3 * D.

2. Calculate the distance covered on the second day: - On the second day, 5/8 (or 62.5%) of the distance covered on the first day was covered. - This can be calculated as (5/8) * (0.3 * D).

3. Calculate the distance covered on the third day: - On the third day, 128% of the distance covered on the second day was covered. - This can be calculated as 1.28 * [(5/8) * (0.3 * D)].

4. Calculate the total distance covered in the first three days: - The total distance covered in the first three days can be calculated by adding the distances covered on each day.

5. Calculate the distance covered on the fourth day: - The distance covered on the fourth day can be calculated by subtracting the total distance covered in the first three days from the total distance covered in four days.

Let's calculate the distance covered on the fourth day using the given information:

1. Calculate the distance covered on the first day: - 30% of the total distance: 0.3 * 800 km = 240 km.

2. Calculate the distance covered on the second day: - 5/8 of the distance covered on the first day: (5/8) * 240 km = 150 km.

3. Calculate the distance covered on the third day: - 128% of the distance covered on the second day: 1.28 * 150 km = 192 km.

4. Calculate the total distance covered in the first three days: - Total distance covered = distance covered on the first day + distance covered on the second day + distance covered on the third day. - Total distance covered = 240 km + 150 km + 192 km = 582 km.

5. Calculate the distance covered on the fourth day: - Distance covered on the fourth day = Total distance covered in four days - Total distance covered in the first three days. - Distance covered on the fourth day = 800 km - 582 km = 218 km.

Therefore, the yacht covered 218 kilometers on the fourth day.