Question

Велосипедист ехал 3 ч со скоростью 18 км/ч и 5 ч со скоростью 16 км/ч найдите среднюю скорость велосипедиста за время движения

Answer 1

1) 18х3=54 (км)-проехал со скоростью 18 км/ч
2) 16х5=80 (км)-проехал со скоростью 16 км/ч
3) 54+80=134 (км)-длина всей пути велосипедиста  
3+5=8 (ч)
4) 134:8=16,75 (км/ч)-средняя скорость
Ответ: средняя скорость велосипедиста 16,75 км/ч.

Answer 2

) 18 * 3 = 54 км - проехал велосипедист со скоростью 18 км/ч
2) 16 * 5 = 80 км - проехал велосипедист со скоростью 16 км/ч
3) 54 + 80 = 134 км - длина всего пути велосипедиста
4) 3 + 5 = 8 ч - время движения велосипедиста
5) 134 : 8 = 16,75 км/ч - средняя скорость движения велосипедиста

Answer 3

Calculating the Average Speed of a Cyclist

To find the average speed of the cyclist, we can use the formula:

Average Speed = Total Distance / Total Time

First, let's calculate the total distance traveled by the cyclist.

The cyclist traveled at a speed of 18 km/h for 3 hours and at a speed of 16 km/h for 5 hours.

Using the formula Distance = Speed × Time, we can calculate the distances traveled at each speed.

For the speed of 18 km/h: Distance1 = 18 km/h × 3 h

For the speed of 16 km/h: Distance2 = 16 km/h × 5 h

Now, let's calculate the total distance traveled by adding Distance1 and Distance2.

Total Distance = Distance1 + Distance2

Next, we'll calculate the total time taken for the entire journey.

Total Time = Time1 + Time2

Finally, we'll use the formula for average speed to find the answer.

Calculations

Using the provided information and the formulas mentioned above, we can calculate the average speed of the cyclist.

Total Distance: Distance1 = 18 km/h × 3 h = 54 km Distance2 = 16 km/h × 5 h = 80 km Total Distance = 54 km + 80 km = 134 km

Total Time: Total Time = 3 h + 5 h = 8 h

Average Speed: Average Speed = Total Distance / Total Time Average Speed = 134 km / 8 h

Answer

The average speed of the cyclist for the entire journey is 16.75 km/h.