Question

Ёжик 18 секунд двигался со скоростью 5ли/с, а лисица прибегает это же путь со скоростью 45 дм/с. На сколько секунд быстрее4 прибегает лисица ?

Answer 1

Calculation of Time Difference

To calculate the time difference between the hedgehog and the fox, we need to compare their speeds and the distance they cover.

The hedgehog moves at a speed of 5 m/s, while the fox runs at a speed of 45 dm/s.

Let's convert the speed of the fox from decimeters per second to meters per second. Since 1 decimeter is equal to 0.1 meters, the speed of the fox is 4.5 m/s.

Now, we can calculate the time it takes for each animal to cover the same distance.

The hedgehog covers the distance in 18 seconds, while the fox covers the same distance in a shorter time.

To find out how much faster the fox is, we need to subtract the time it takes for the hedgehog from the time it takes for the fox.

Let's calculate the time difference:

Time taken by the hedgehog = 18 seconds Time taken by the fox = 18 seconds - Time difference

To find the time difference, we need to divide the distance by the speed of the fox:

Time difference = Distance / Speed of the fox

Since the distance covered by both animals is the same, we can assume it to be 1 unit.

Therefore, the time difference can be calculated as follows:

Time difference = 1 unit / 4.5 m/s

Let's calculate the time difference:

Time difference = 1 / 4.5 = 0.222 seconds

Therefore, the fox reaches the destination approximately 0.222 seconds faster than the hedgehog.