Question

Из Москвы в Санкт-Петербург выехали одновременно две машины: одна со скоростью 90 км/ч а другая со скоростью 78 км/ч. Какое растояние будет через полчаса? через час?

Answer 1

7 км и 25 км будет между машинами

Answer 2

Calculation of Distance Traveled

To calculate the distance traveled by each car, we can use the formula:

Distance = Speed × Time

Let's calculate the distances traveled by each car after half an hour (0.5 hours) and after one hour (1 hour).

1. After half an hour (0.5 hours): - Car 1: Speed = 90 km/h, Time = 0.5 hours - Car 2: Speed = 78 km/h, Time = 0.5 hours

Using the formula, we can calculate the distances:

- Car 1: Distance = 90 km/h × 0.5 hours = 45 km - Car 2: Distance = 78 km/h × 0.5 hours = 39 km

2. After one hour (1 hour): - Car 1: Speed = 90 km/h, Time = 1 hour - Car 2: Speed = 78 km/h, Time = 1 hour

Using the formula, we can calculate the distances:

- Car 1: Distance = 90 km/h × 1 hour = 90 km - Car 2: Distance = 78 km/h × 1 hour = 78 km

Therefore, after half an hour, Car 1 will be 45 km away and Car 2 will be 39 km away from the starting point in Moscow. After one hour, Car 1 will be 90 km away and Car 2 will be 78 km away from the starting point.

Please note that these calculations assume that the cars maintain a constant speed throughout the journey.