Question

Из пункта А связной доставил донесение в пункт В за 30 минут.На обратном пути он уменьшил скорость на 1 км/ч и затратил на дорогу 36минут. Определите, с какой скоростью шёл связной из А в В."

Answer 1

.............................................

Answer 2

Calculation of the Speed of the Courier

To determine the speed at which the courier traveled from point A to point B, we can use the information provided. Let's break down the problem step by step:

1. The courier delivered a message from point A to point B in 30 minutes. 2. On the return trip, the courier reduced their speed by 1 km/h and took 36 minutes to travel the same distance.

To find the speed of the courier, we need to calculate the distance between point A and point B. Since the time taken for both the delivery and the return trip is given, we can assume that the distance is the same for both.

Let's denote the speed of the courier on the delivery trip as v km/h. The speed on the return trip would then be (v - 1) km/h.

Using the formula: Speed = Distance / Time, we can set up the following equations:

1. For the delivery trip: v = Distance / 30 minutes 2. For the return trip: (v - 1) = Distance / 36 minutes

Since the distance is the same for both trips, we can equate the two equations:

Distance / 30 minutes = Distance / 36 minutes

To solve this equation, we