Question

Автобус и машина одновременно выехали навстречу друг другу.Скорость автобуса 70 км/ч ,а скорость машины составляет семь дестятых скорости автобуса.Через какое время они встретятся если растояние между ними 85 км?? .

Answer 1

Через 5 мин они встретятся

Answer 2

To find out when the bus and the car will meet, we can use the formula: time = distance / relative speed. The relative speed is the sum of the speeds of the bus and the car since they are moving towards each other.

Given: - Speed of the bus = 70 km/h - Speed of the car = 7/10 * 70 km/h (seven tenths of the bus's speed) - Distance between them = 85 km

Let's calculate the time it takes for them to meet:

Calculating the relative speed:

The relative speed is the sum of the speeds of the bus and the car. Relative speed = Speed of the bus + Speed of the car

Relative speed = 70 km/h + (7/10 * 70 km/h) = 70 km/h + 49 km/h = 119 km/h

Calculating the time it takes to meet:

Time = Distance / Relative speed

Time = 85 km / 119 km/h

Calculating the time using the given values:

Time = 0.714 hours

To convert this to minutes, we multiply by 60:

Time = 0.714 hours * 60 minutes/hour

Time = 42.86 minutes

Therefore, the bus and the car will meet after approximately 42.86 minutes.

Please note that the above calculation assumes constant speeds for both the bus and the car throughout the entire journey.