Question

Велосипедист ехал 3 часа со скоростью 14 километров час и 2 часа со скоростью 17 километров час Найдите среднюю скорость велосипедиста за все время движения помогите плс

Answer 1

3х14=42(км)-за 3 часа со скоростью 14 км ч
2х17=34(км)-за 2 часа со скоростью 17 км ч
2+3=5(ч)-велосипедист был в пути
42+34=76(км)-проехал велосипедист
76:5=15.2(км/ч)-средняя скорость

Answer 2

(14+14+14+17+17)/5=15,2 км/ч

Answer 3

Calculation of Average Speed

To find the average speed of the cyclist, we need to calculate the total distance traveled and the total time taken.

The cyclist traveled for 3 hours at a speed of 14 kilometers per hour and 2 hours at a speed of 17 kilometers per hour.

Let's calculate the total distance traveled:

- Distance traveled at 14 kilometers per hour for 3 hours: 14 km/h * 3 h = 42 kilometers - Distance traveled at 17 kilometers per hour for 2 hours: 17 km/h * 2 h = 34 kilometers

The total distance traveled is 42 kilometers + 34 kilometers = 76 kilometers.

Now, let's calculate the total time taken:

- Time taken at 14 kilometers per hour for 3 hours: 3 hours - Time taken at 17 kilometers per hour for 2 hours: 2 hours

The total time taken is 3 hours + 2 hours = 5 hours.

To find the average speed, we divide the total distance traveled by the total time taken:

Average speed = Total distance / Total time = 76 kilometers / 5 hours = 15.2 kilometers per hour.

Therefore, the average speed of the cyclist for the entire journey is 15.2 kilometers per hour.