Question

Звери одновременно отправились в путь. Скорость зайца - 14 км/ч,скорость медведя - в 1.25 раза меньше скорости медведя,а скорость черепахи на 7,8 км/ч меньше скорости медведя.Какое растояние будет между зайцем и черепахой через 3,5 часа после начала движения? Заранее спасибо)

Answer 1

Видимо, скорость медведя в 1,25 раза меньше скорости зайца?

Скорость зайца: v₁ = 14 км/ч

Скорость медведя: v₂ = v₁ : 1,25 = 14 : 1,25 = 11,2 (км/ч)

Скорость черепахи: v₃ = v₂ - 7,8 = 11,2 - 7,8 = 3,4 (км/ч)

Скорость удаления зайца от черепахи: v = v₁ - v₃ = 14 - 3,4 = 10,6 (км/ч)

Расстояние между зайцем и черепахой через 3,5 ч после начала движения:

S = vt = 10,6 * 3,5 = 37,1 (км)

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Ответ: 37,1 км.

Answer 2

Problem Analysis

We are given the speeds of a hare, a bear, and a turtle. We need to find the distance between the hare and the turtle after 3.5 hours of travel.

Given Information

- Speed of the hare: 14 km/h - Speed of the bear: 1.25 times slower than the hare - Speed of the turtle: 7.8 km/h slower than the bear

Calculating the Speeds

To calculate the speed of the bear, we need to find 1.25 times the speed of the hare: - Speed of the bear = 1.25 * 14 km/h = 17.5 km/h

To calculate the speed of the turtle, we need to subtract 7.8 km/h from the speed of the bear: - Speed of the turtle = 17.5 km/h - 7.8 km/h = 9.7 km/h

Calculating the Distances

To calculate the distances traveled by each animal after 3.5 hours, we can use the formula: - Distance = Speed * Time

For the hare: - Distance traveled by the hare = 14 km/h * 3.5 hours = 49 km

For the bear: - Distance traveled by the bear = 17.5 km/h * 3.5 hours = 61.25 km

For the turtle: - Distance traveled by the turtle = 9.7 km/h * 3.5 hours = 33.95 km

Finding the Distance Between the Hare and the Turtle

To find the distance between the hare and the turtle after 3.5 hours, we subtract the distance traveled by the turtle from the distance traveled by the hare: - Distance between the hare and the turtle = 49 km - 33.95 km = 15.05 km

Therefore, the distance between the hare and the turtle after 3.5 hours of travel is approximately 15.05 km.