Question

Из Москвы в Санкт-Петербург одновременно выехали автобус и легковая машина .Скорость автобуса bкм/ч а скорость машины aкм/ч(a больше b)запишите в виде выражения 1) расстояние которое пройдет автобус за 4 часа 2)расстояние которое пройдет машина за 4 часа 3)скорость удаления автобуса и машины 4)на какое расстояние машина обгонит автобус через 4 часа после начала движения

Answer 1

а (км/ч) - скрость машины

b (км/ч) - скорость автобуса

a>b

1) 4*b=4b (км) -расстояние которое пройдет автобус за 4 часа

2) 4*а=4а (км)расстояние которое пройдет машина за 4 часа

3) a-b (км/ч) - скорость удаления автобуса и машины

4) 4*(a-b) (км) - на какое расстояние машина обгонит автобус через 4 часа после начала движения

Answer 2

Calculations for Bus and Car Travel

1) Distance Traveled by the Bus in 4 Hours: - The distance traveled by the bus in 4 hours can be calculated using the formula: distance = speed * time. - Given the speed of the bus as b km/h, the distance traveled by the bus in 4 hours is 4b km.

2) Distance Traveled by the Car in 4 Hours: - Similarly, the distance traveled by the car in 4 hours can be calculated using the same formula: distance = speed * time. - Given the speed of the car as a km/h, the distance traveled by the car in 4 hours is 4a km.

3) Relative Speed of the Bus and Car: - The relative speed of the bus and the car can be calculated by taking the difference in their speeds, as the car is assumed to be moving faster than the bus. - The relative speed of the bus and the car is (a - b) km/h.

4) Distance Covered by the Car in Overtaking the Bus after 4 Hours: - To find the distance at which the car overtakes the bus after 4 hours, we can use the formula: distance = relative speed * time. - Substituting the relative speed as (a - b) km/h and the time as 4 hours, the distance covered by the car in overtaking the bus after 4 hours is 4(a - b) km.

Therefore, the expressions for the given scenarios are: 1) Distance traveled by the bus in 4 hours: 4b km 2) Distance traveled by the car in 4 hours: 4a km 3) Relative speed of the bus and car: (a - b) km/h 4) Distance at which the car overtakes the bus after 4 hours: 4(a - b) km

Please let me know if there is anything else you would like to discuss or if you need further assistance!