Question

С одной автостоянки одновременно в противоположных направлениях выехали два автомобиля.Через сколько часов расстояние между ними будет 510 км,если скорость первого автомобиля 45 км/ч ,а скорость второго на 12 км/ч больше?

Answer 1

510/(45+12+45)=5 часов

Answer 2

Calculating the Time for the Distance Between Two Cars to be 510 km

To calculate the time it takes for the distance between two cars to be 510 km, given that they are traveling in opposite directions and one car is traveling at 45 km/h while the other is traveling at a speed 12 km/h greater, we can use the following approach:

1. Calculate the combined speed of the two cars. 2. Use the formula: time = distance / speed to find the time it takes for the distance between the cars to be 510 km.

Calculation Steps

1. Calculate the combined speed of the two cars: - The speed of the first car is 45 km/h. - The speed of the second car is 45 km/h + 12 km/h = 57 km/h.

2. Use the formula: time = distance / speed to find the time it takes for the distance between the cars to be 510 km: - For the first car: time = 510 km / 45 km/h = 11.33 hours. - For the second car: time = 510 km / 57 km/h = 8.95 hours.

Therefore, the time it takes for the distance between the two cars to be 510 km is approximately 11.33 hours for the first car and 8.95 hours for the second car.

Conclusion

Given the speeds of the two cars and their opposite directions of travel, the time it takes for the distance between them to be 510 km is approximately 11.33 hours for the first car and 8.95 hours for the second car.