Question

1.)3/8* (11/14-3/14) = задача: Поезд шел 4 часа 7/60 скоростью 80км/ч и 2 1/2 часа часа скоростью 70 км/ч. Сколько всего километров проехал поезд?? ПОМОГИТЕ ))

Answer 1

Пример
1)=8/14
2)3/8*8/14=3/14
ответ 3/14
задача
напиши грамотнее задачу

Answer 2

Calculation of the Total Distance Traveled by the Train

To calculate the total distance traveled by the train, we need to find the sum of the distances covered during the two different time intervals.

1. Distance covered in the first interval: - Time: 4 hours 7/60 minutes - Speed: 80 km/h

To find the distance covered, we can use the formula: distance = speed × time.

Converting the time to decimal form, we have: 4 hours 7/60 minutes = 4.1167 hours.

Using the formula, the distance covered in the first interval is: distance1 = 80 km/h × 4.1167 hours.

2. Distance covered in the second interval: - Time: 2 1/2 hours - Speed: 70 km/h

Converting the time to decimal form, we have: 2 1/2 hours = 2.5 hours.

Using the formula, the distance covered in the second interval is: distance2 = 70 km/h × 2.5 hours.

Now, we can find the total distance traveled by the train by adding the distances covered in the two intervals: total distance = distance1 + distance2.

Let's calculate the distances:

1. Distance covered in the first interval: - Time: 4.1167 hours - Speed: 80 km/h

distance1 = 80 km/h × 4.1167 hours

2. Distance covered in the second interval: - Time: 2.5 hours - Speed: 70 km/h

distance2 = 70 km/h × 2.5 hours

3. Total distance traveled by the train:

total distance = distance1 + distance2

Let's calculate the values:

1. Distance covered in the first interval: - Time: 4.1167 hours - Speed: 80 km/h

distance1 = 80 km/h × 4.1167 hours = 329.336 km

2. Distance covered in the second interval: - Time: 2.5 hours - Speed: 70 km/h

distance2 = 70 km/h × 2.5 hours = 175 km

3. Total distance traveled by the train:

total distance = distance1 + distance2 = 329.336 km + 175 km = 504.336 km

Therefore, the total distance traveled by the train is approximately 504.336 km.