Question

от деревни до города велосипедист ехал 4ч со скоростью 12км/ч.Скольковремени он потратитна обратный путьпо той же дороге,если увеличит скорость на 4 км/ч? с условием и решением

Answer 1

Ответ 3 часа на путь обратно

Answer 2

Problem Analysis

To solve this problem, we need to determine the time it will take for the cyclist to travel back from the city to the village at an increased speed. We are given that the cyclist traveled from the village to the city in 4 hours at a speed of 12 km/h. We need to find the time it will take for the cyclist to travel back to the village at a speed that is 4 km/h faster.

Solution

Let's calculate the distance between the village and the city using the formula: distance = speed * time.

Given: - Speed from the village to the city = 12 km/h - Time taken from the village to the city = 4 hours

Using the formula, we can calculate the distance: distance = 12 km/h * 4 hours = 48 km

Now, let's calculate the time it will take for the cyclist to travel back to the village at a speed of 16 km/h (12 km/h + 4 km/h).

Using the formula, we can calculate the time: time = distance / speed

Substituting the values: time = 48 km / 16 km/h = 3 hours

Therefore, it will take the cyclist 3 hours to travel back to the village at a speed of 16 km/h.

Answer

The cyclist will spend 3 hours on the return journey from the city to the village, assuming the speed is increased by 4 km/h.

Solution Steps

1. Calculate the distance using the formula: distance = speed * time. - Distance = 12 km/h * 4 hours = 48 km. 2. Calculate the time using the formula: time = distance / speed. - Time = 48 km / 16 km/h = 3 hours.