Question

Автомабиль проехал расстояние между городами за 3 часа , двигаясь со скоростью 80км/ч .Обратный путь автомобиль преодалел за 4 часа . На сколько меньше была скорость автомобиля на обратном пути?

Answer 1

1)80x3=240(км)-Между городами
2)240:4=60(км/ч)- скорость, обратного пути
3)80-60=20(км/ч)
Ответ: Разница 20 км/ч.

Answer 2

Calculation of Speed

To find the difference in speed between the forward and return journeys#### Calculating the Speed of the Car To calculate the speed of the car on the return trip, we can use the formula: speed = distance / time

Given that the car traveled the same distance on the return trip, we can use the same distance for both calculations.

Speed Calculation for the Outward Trip

On the outward trip, the car traveled the distance in 3 hours at a speed of 80 km/h.

Using the formula: speed = distance / time

We can calculate the distance: distance = speed * time

Substituting the given values: distance = 80 km/h * 3 h = 240 km

So, the distance between the cities is 240 km.

Speed Calculation for the Return Trip

On the return trip, the car traveled the same distance in 4 hours.

Using the same formula: speed = distance / time

We can calculate the speed: speed = distance / time = 240 km / 4 h = 60 km/h

Difference in Speed

The speed of the car on the return trip was 20 km/h less than the speed on the outward trip.

Therefore, the speed of the car on the return trip was 20 km/h less than the speed on the outward trip.