Question

Винни-Пух пошёл в гости к Пяточку. Первую половину пути он шёл со скоростью 20 см/с, вторую половину бежал со скоростью 30 см/с. С какой средней скоростью двигался Винни-Пух? ОЧЕНЬ НАДОО ОТВЕТЫ: 1)24 см/с; 3) 28 см/с; 2)60 см/с; 4) 48 см/с.

Answer 1

Vср=S/t

(S/2)/V1+(S/2)/V2=t

S/40+S/60=t

5S/120=t

t=S/24

Vср=S/t=S/(S/24)=24см/с

ответ 1

Answer 2

Calculation of Winnie-the-Pooh's Average Speed

To calculate Winnie-the-Pooh's average speed, we need to find the total distance traveled and the total time taken.

Winnie-the-Pooh walked the first half of the distance at a speed of 20 cm/s and ran the second half at a speed of 30 cm/s. Let's assume the total distance is D cm.

The time taken to walk the first half of the distance can be calculated using the formula:

Time taken to walk = Distance / Speed

The time taken to run the second half of the distance can also be calculated using the same formula.

Now, let's calculate the time taken to walk and run:

Time taken to walk = (D/2) / 20 cm/s

Time taken to run = (D/2) / 30 cm/s

To find the total time taken, we can add the time taken to walk and the time taken to run:

Total time taken = Time taken to walk + Time taken to run

Now, let's calculate the average speed:

Average speed = Total distance / Total time taken

Since we don't have the specific value of the distance, we can't calculate the exact average speed. However, we can provide the formula and the steps to calculate it once the distance is known.

Please provide the value of the total distance, and I'll be happy to help you calculate the average speed of Winnie-the-Pooh.