Question

Автомобиль за 1 час проехал 60 км/ч,потом 1 час стоял после этого за 1 час проехал ешё 90 км.Какова средняя скорость автомобиля?

Answer 1

Дано:
S1=60км
S2=0 км
S3= 90км
t1=1ч
t2=1ч
t3=1ч
Найти: Vср
Решение:
S=S1+S2+S3=60+0+90=150
t=t1+t2+t3=1+1+1=3
Vср=S/t=150/3=50

Answer 2

Calculation of Average Speed

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

Given the information provided, the car traveled at a speed of 60 km/h for 1 hour, then stood still for 1 hour, and finally traveled at a speed of 90 km/h for 1 hour.

To find the total distance traveled, we add the distances covered during each hour: 60 km + 0 km + 90 km = 150 km.

To find the total time taken, we add the time spent during each hour: 1 hour + 1 hour + 1 hour = 3 hours.

Now, we can calculate the average speed using the formula:

Average Speed = Total Distance / Total Time

Substituting the values, we get:

Average Speed = 150 km / 3 hours = 50 km/h

Therefore, the average speed of the car is 50 km/h.