Question

Из Москвы в Санк-Пеееетербург выехали две машины.Одна со скоросьтю 78км\ч а другая со скоростью 90км\ч.Какое расстояние будет между ними через полчаса?Через час?

Answer 1

78*0,5=39
90*0,5=45
45+39=93
Ответ: 93 км

Answer 2

Calculation of Distance:

To calculate the distance between the two cars, we can use the formula: distance = speed × time.

1. After half an hour: - The first car has traveled at a speed of 78 km/h for half an hour, so the distance covered by the first car is 78 km/h × 0.5 h = 39 km. - The second car has traveled at a speed of 90 km/h for half an hour, so the distance covered by the second car is 90 km/h × 0.5 h = 45 km.

2. After an hour: - The first car has traveled at a speed of 78 km/h for an hour, so the distance covered by the first car is 78 km/h × 1 h = 78 km. - The second car has traveled at a speed of 90 km/h for an hour, so the distance covered by the second car is 90 km/h × 1 h = 90 km.

Therefore, the distance between the two cars after half an hour is 39 km, and after an hour, it is 78 km.