Question

Велосипед за 1 час 12 мин проехал 2/7 всего расстояния от села до города. Через сколько времени после начала поездки велосипед будет на середине пути, если он будет ехать с одной и той же скоростью?

Answer 1

1час12мин=1целая 12/60= 1целая1/5=6/5
2/7 разделить на 6/5=2/7*5/6=10/42=5/21  проезжает за 1 час
1/2 разделить на 5/21=1/2*21/5=21/10=2,1 ч или 2 часа 6 минут

Answer 2

Calculating the Time to Reach the Midpoint

To calculate the time it takes for the bicycle to reach the midpoint of the total distance, we need to first determine the total time it takes for the bicycle to travel the entire distance.

Given: - The bicycle travels the total distance from the village to the city in 1 hour and 12 minutes, which is equivalent to 72 minutes. - The bicycle covers 2/7 of the total distance in this time.

To find the total time it takes for the bicycle to travel the entire distance, we can set up a proportion:

Total time / Total distance = Time covered / Distance covered

Let's denote the total time as T, the total distance as D, the time covered as t, and the distance covered as d.

The proportion can be written as:

T / D = t / d

We know that the bicycle covers 2/7 of the total distance in 72 minutes. Therefore, we can substitute the values into the proportion:

T / D = 72 / (2/7)D

Simplifying the proportion:

T = 72 * (7/2)

T = 252 minutes

Now that we know the total time it takes for the bicycle to travel the entire distance is 252 minutes, we can find the time it takes for the bicycle to reach the midpoint.

Since the bicycle travels at a constant speed, we can assume that it covers equal distances in equal amounts of time. Therefore, the time it takes for the bicycle to reach the midpoint is half of the total time.

Time to reach midpoint = Total time / 2

Substituting the value of the total time:

Time to reach midpoint = 252 / 2

Time to reach midpoint = 126 minutes

Therefore, the bicycle will reach the midpoint of the total distance after 126 minutes.