Question

Пешеход должен был пройти 12 км за некоторое время,но он был задержан с выходом на 1час поэтому ему пришлось увеличить скорость на 1км/ч.С какой скоростью шел пешеход?Решить с помощью квадратного уровнения

Answer 1

Объяснение:

Пешеход должен был пройти 12 км за некоторое время,но он был задержан с выходом на 1час поэтому ему пришлось увеличить скорость на 1км/ч.С какой скоростью шел пешеход?Решить с помощью квадратного уровнения

Answer 2

Problem Analysis

A pedestrian was supposed to walk a distance of 12 km in a certain amount of time. However, the pedestrian was delayed by 1 hour, so they had to increase their speed by 1 km/h. We need to determine the pedestrian's original walking speed.

Solution

Let's assume the pedestrian's original walking speed is x km/h. Since the pedestrian had to increase their speed by 1 km/h, their new speed is (x + 1) km/h.

We can use the formula distance = speed × time to calculate the time it would take the pedestrian to walk 12 km at their original speed and the time it actually took them to walk the same distance at the increased speed.

At the original speed: - Distance = 12 km - Speed = x km/h - Time = Distance / Speed = 12 / x hours

At the increased speed: - Distance = 12 km - Speed = (x + 1) km/h - Time = Distance / Speed = 12 / (x + 1) hours

Since the pedestrian was delayed by 1 hour, the actual time taken at the increased speed is 1 hour more than the time taken at the original speed. Therefore, we can set up the following equation:

12 / (x + 1) = 12 / x + 1

To solve this equation, we can cross-multiply and simplify:

12x = 12(x + 1) 12x = 12x + 12 12x - 12x = 12 0 = 12

The equation has no solution, which means there is no value of x that satisfies the equation. This implies that there is no original walking speed that would allow the pedestrian to cover the distance of 12 km in the given time frame, even with the increased speed.

Therefore, it is not possible to determine the pedestrian's original walking speed based on the given information.

Please let me know if there's anything else I can help you with!