Question

Помогите решить задачу : ОТ берега маленького строва к месту лежбища тюленей одновременно в одном направлении на промысел морсгого зверя отправились 2 гребных лодки.Скорость первой лодки была 3 мили в час.Артельщикам со втрой лодкитребовалось опередить первую лодку на 8 миль и достичь лежбища через 4 часа.С какой скоростью должна была двигаться вторая лодка

Answer 1

1) находим расстояние, пройденное первой лодкой за 4 часа:

3 мили/ч * 4 часа = 12 миль

2) вторая лодка должна опередить первую на 8 миль, т. е. она должна пройти за 4 часа:

12 миль + 8 миль = 20 миль

3) скорость второй лодки будет:

20 миль / 4 часа = 5 миль/ч

 

Ответ: 5 миль/час - скорость второй лодки

Answer 2

Problem Analysis

We are given that two rowing boats set off simultaneously from the shore of a small island towards the seal breeding ground. The first boat has a speed of 3 miles per hour. The crew of the second boat needs to overtake the first boat by 8 miles and reach the breeding ground in 4 hours. We need to find the speed at which the second boat should travel.

Solution

Let's assume the speed of the second boat is x miles per hour.

We know that the first boat travels at a speed of 3 miles per hour and the second boat needs to overtake it by 8 miles. This means that the second boat needs to cover a distance of 8 miles more than the first boat.

Since both boats travel for the same amount of time, we can set up the following equation:

Distance covered by the first boat = Distance covered by the second boat + 8 miles

Using the formula: Distance = Speed × Time, we can write:

3 miles/hour × Time = x miles/hour × Time + 8 miles

Simplifying the equation, we get:

3T = xT + 8

Where T represents the time taken by both boats.

We are also given that the second boat reaches the breeding ground in 4 hours. So, we can substitute T = 4 into the equation:

3 × 4 = x × 4 + 8

Simplifying further:

12 = 4x + 8

Rearranging the equation:

4x = 12 - 8

4x = 4

Dividing both sides by 4:

x = 1

Therefore, the second boat should travel at a speed of 1 mile per hour to overtake the first boat by 8 miles and reach the breeding ground in 4 hours.

Answer

The second boat should travel at a speed of 1 mile per hour.