Question

В первый раз рыбак поехал на рыбалку на велосипеде, но обратно шел пешком . На весь путь он потратил 1 час . Во второй раз он до реки и обратно он ездил на велосипеде и потратил на это 40 минут. За сколько времени рыбак пройдет туда и обратно пешком? А) 10 мин В) 40 мин С) 50 мин D) 55 мин

Answer 1

С) 55 минут. рыбак порйдёт пешком

Answer 2

Problem Analysis

The fisherman went fishing for the first time on a bicycle and returned on foot, taking a total of 1 hour. The second time, he went to the river and back on a bicycle, taking 40 minutes. We need to determine how long it will take for the fisherman to go to the river and back on foot.

Solution

Let's assume that the time it takes for the fisherman to go to the river on a bicycle is x minutes. Since the round trip on a bicycle took 40 minutes, the time it took for the fisherman to return from the river on a bicycle is also x minutes.

According to the given information, the fisherman spent a total of 1 hour (60 minutes) on the first trip, with the return journey on foot. This means that the time it took for the fisherman to return on foot is 60 - x minutes.

To find the total time for the round trip on foot, we need to add the time it took for the fisherman to go to the river on foot and the time it took for the fisherman to return on foot. Therefore, the total time for the round trip on foot is (60 - x) + (60 - x) = 120 - 2x minutes.

Since we want to find the time for the round trip on foot, we need to solve the equation 120 - 2x = t, where t represents the time for the round trip on foot.

Let's solve the equation:

120 - 2x = t

Rearranging the equation:

2x = 120 - t

Dividing both sides by 2:

x = (120 - t) / 2

Therefore, the fisherman will take (120 - t) / 2 minutes for the round trip on foot.

Now, let's calculate the answer using the given options:

A) 10 minutes B) 40 minutes C) 50 minutes D) 55 minutes

We can substitute each option into the equation and see which one gives us the correct result.

A) (120 - 10) / 2 = 110 / 2 = 55 minutes B) (120 - 40) / 2 = 80 / 2 = 40 minutes C) (120 - 50) / 2 = 70 / 2 = 35 minutes D) (120 - 55) / 2 = 65 / 2 = 32.5 minutes

Based on the calculations, none of the given options match the correct answer. Therefore, none of the options A), B), C), or D) are correct.

Please note that the given options do not provide the correct answer.