Question

От двух пристаней отошли одновременно навстречу друг другу катер и лодка и встретились через d ч.Скорость лодки-k км/ч,скорость катера-в b раз больше.Найди расстояние между пристанями.

Answer 1

Сложи скорость и умнож на время

Answer 2

Нужно:сложить скорости и умножить на время

Answer 3

Problem Analysis

We are given that a boat and a motorboat depart from two piers simultaneously and meet after d hours. The speed of the boat is k km/h, and the speed of the motorboat is b times greater than the speed of the boat. We need to find the distance between the piers.

Solution

Let's assume that the distance between the piers is D km.

The boat's speed is k km/h, so in d hours, it will cover a distance of k * d km.

The motorboat's speed is b times greater than the boat's speed, so its speed is b * k km/h. In d hours, the motorboat will cover a distance of (b * k) * d km.

Since the boat and the motorboat meet after d hours, the sum of the distances covered by both of them should be equal to the distance between the piers.

Therefore, we can write the equation:

k * d + (b * k) * d = D

Simplifying the equation, we get:

d * (k + b * k) = D

d * k * (1 + b) = D

Finally, we can solve for D:

D = d * k * (1 + b)

The distance between the piers is equal to d times the speed of the boat times the sum of 1 and b.

Answer

The distance between the piers is given by the formula D = d * k * (1 + b), where d is the time in hours, k is the speed of the boat in km/h, and b is the factor by which the speed of the motorboat is greater than the speed of the boat.

Please let me know if I can help you with anything else.