Question

из города выехала грузовая машина со скоростью 40км/ч. когда она отъехала от города на расстоянии 60км,из города в том же направлении выехала легковая машина со скоростью 70км/ч. сколько км будет между ними через 1ч,2ч,3ч?

Answer 1

1)70*1=70км проедет легковая машина.
2)70-60=10км расстояние между ними через 1 час.
3)70*2=140км проедет легковая машина.
4)140-60=80км расстояние между ними через 2 часа.
5)70*3=210км проедет легковая машина.
6)210-60=150км расстояние между ними через 3 часа.
Ответ:10;80;150.

Answer 2

Calculation of Distance between the Trucks

To calculate the distance between the two trucks after a certain amount of time, we need to consider their speeds and the time elapsed. Let's calculate the distances after 1 hour, 2 hours, and 3 hours.

1. After 1 hour: - The truck's speed is 40 km/h, so it would have traveled 40 km in 1 hour. - The car's speed is 70 km/h, so it would have traveled 70 km in 1 hour. - The initial distance between them is 60 km. - Therefore, the distance between them after 1 hour would be (60 + 40) - 70 = 30 km.

2. After 2 hours: - The truck's speed is 40 km/h, so it would have traveled 40 km in 2 hours. - The car's speed is 70 km/h, so it would have traveled 70 km in 2 hours. - The initial distance between them is 60 km. - Therefore, the distance between them after 2 hours would be (60 + 40 + 40) - (70 + 70) = 0 km. At this point, they would have met each other.

3. After 3 hours: - The truck's speed is 40 km/h, so it would have traveled 40 km in 3 hours. - The car's speed is 70 km/h, so it would have traveled 70 km in 3 hours. - The initial distance between them is 60 km. - Therefore, the distance between them after 3 hours would be (60 + 40 + 40 + 40) - (70 + 70 + 70) = -30 km. The negative distance indicates that the car has moved 30 km ahead of the truck.

So, after 1 hour, the distance between the two trucks would be 30 km. After 2 hours, they would meet each other, and after 3 hours, the car would be 30 km ahead of the truck.

Please note that these calculations assume constant speeds and no external factors affecting the vehicles' movements.