Question

Моторная лодка двигалась против течения реки ,прошла расстояние от тур-базы до города за 3 часа . А обратный путь 2часа 15минут . Скорость течения реки 4км/ч. Какова собственная скорость лодки.

Answer 1

Ответ к твоему вопросу

Answer 2

2+3=5(ч)
4•5=20(км)
Ответ. 20 км за 5 часов

Answer 3

Calculation of Boat's Speed

To calculate the boat's speed, we can use the formula:

Boat's Speed = Distance / Time

First, let's calculate the boat's speed for the trip from the city to the tourist base.

- Distance = Distance from the tourist base to the city - Time = 3 hours - River's current speed = 4 km/h

Using the given information, we can calculate the boat's speed for the trip from the tourist base to the city.

Boat's Speed = (Distance + (River's current speed * Time)) / Time

Boat's Speed = (Distance + (4 * 3)) / 3

Boat's Speed = (Distance + 12) / 3

Now, let's calculate the boat's speed for the return trip from the city to the tourist base.

- Distance = Distance from the city to the tourist base - Time = 2 hours 15 minutes = 2.25 hours - River's current speed = 4 km/h

Using the given information, we can calculate the boat's speed for the return trip from the city to the tourist base.

Boat's Speed = (Distance - (River's current speed * Time)) / Time

Boat's Speed = (Distance - (4 * 2.25)) / 2.25

Boat's Speed = (Distance - 9) / 2.25

Solving for Boat's Speed

We have two equations for the boat's speed:

1. Boat's Speed = (Distance + 12) / 3 2. Boat's Speed = (Distance - 9) / 2.25

By solving these equations simultaneously, we can find the boat's speed.

Let's solve for the boat's speed.