Question

Ребята ОЧЕНЬ СРОЧНО помогите с математикой обязательно со схемой конькобежец бежал 6 мин. После чего ему осталось пробежать 680м. Длина дистанции 5000м. С какой скоростью бежит конько бежец??? расстояние между двумя островами 72км. Ледокол прошёл четверть этого расстояния за 2ч. Какова скорость ледокола? Сколько времени занял весь путь???

Answer 1

В 1 задаче нужно скорость поделить на время

Answer 2

Смотри решение во вложении.

Answer 3

Calculation of Speed for the Speed Skater:

To calculate the speed at which the speed skater is running, we can use the formula:

Speed = Distance / Time

Given that the speed skater ran for 6 minutes and then had to run 680 meters, and the total distance of the race is 5000 meters, we can calculate the remaining distance the speed skater has to run:

Remaining Distance = Total Distance - Distance Covered

Remaining Distance = 5000 meters - 680 meters = 4320 meters

Now, we can calculate the time it took for the speed skater to cover the remaining distance:

Time = Distance / Speed

Time = 4320 meters / 6 minutes

To convert minutes to seconds, we multiply by 60:

Time = 4320 meters / (6 minutes * 60 seconds/minute)

Simplifying the equation:

Time = 4320 meters / 360 seconds

Now, we can calculate the speed of the speed skater:

Speed = Distance / Time

Speed = 680 meters / 360 seconds

Simplifying the equation:

Speed = 1.89 meters/second

Therefore, the speed at which the speed skater is running is 1.89 meters/second.

Calculation of Speed for the Icebreaker:

To calculate the speed of the icebreaker, we can use the formula:

Speed = Distance / Time

Given that the icebreaker covered a quarter of the distance (72 km) in 2 hours, we can calculate the total distance covered by the icebreaker:

Total Distance = Distance Covered / Fraction of Distance Covered

Total Distance = 72 km / 1/4

Simplifying the equation:

Total Distance = 72 km * 4

Total Distance = 288 km

Now, we can calculate the speed of the icebreaker:

Speed = Distance / Time

Speed = 288 km / 2 hours

To convert hours to seconds, we multiply by 3600:

Speed = 288 km / (2 hours * 3600 seconds/hour)

Simplifying the equation:

Speed = 288 km / 7200 seconds

Now, we can calculate the speed of the icebreaker:

Speed = 0.04 km/second

Therefore, the speed of the icebreaker is 0.04 km/second.

Calculation of Time for the Icebreaker's Journey:

To calculate the time it took for the icebreaker to cover the entire distance of 72 km, we can use the formula:

Time = Distance / Speed

Given that the distance is 72 km and the speed is 0.04 km/second, we can calculate the time:

Time = 72 km / 0.04 km/second

Simplifying the equation:

Time = 1800 seconds

Therefore, the icebreaker took 1800 seconds to cover the entire distance of 72 km.