Question

автомобиль ехал 20 минут со скоростью 100 км/час . с какой скоростью должен ехать велосипедист, чтобы проехать тот же участок пути за 1 час 20 минут?

Answer 1

S=v*t

S= 27.8м/с*1200с=33600м(авто)

 

v=S/t=33600/4800c= 7 м/с=25,2 км/ч

Answer 2

Calculating the Speed of the Bicyclist

To find the speed at which the bicyclist should travel to cover the same distance in 1 hour and 20 minutes, we can use the formula:

Speed = Distance / Time

Given that the car traveled for 20 minutes at a speed of 100 km/h, we can calculate the distance covered by the car and then use it to find the speed of the bicyclist.

Calculating the Distance Covered by the Car

First, let's convert the car's travel time to hours: - 20 minutes = 20/60 = 1/3 hours

Now, we can calculate the distance covered by the car: - Distance = Speed × Time - Distance = 100 km/h × 1/3 h - Distance = 100/3 km

Calculating the Speed of the Bicyclist

Now, we can find the speed at which the bicyclist should travel to cover the same distance in 1 hour and 20 minutes: - Total time = 1 hour + 20 minutes = 1 + 20/60 = 1.33 hours

Using the formula Speed = Distance / Time, we can calculate the speed of the bicyclist: - Speed = (100/3) km / 1.33 hours - Speed ≈ 75.19 km/h

Therefore, the bicyclist should travel at a speed of approximately 75.19 km/h to cover the same distance in 1 hour and 20 minutes.