Question

Помогите решить! Теплоход плыл 3,2 ч по течению реки и 2,5 ч против течения. Какой путь проплыл теплоход за все это время, если его собственная скорость 28,8 км/ч, а скорость течения 2,2 км/ч?

Answer 1

1)3,2×(28,8+2,2)=99,2км-проплыл пароход по теч реки
2)2,5×(28,8-2,2)=66,5км-проплыл пароход против течения
3)99,2+66,5=165,7км-проплыл всего

Answer 2

28,8+2,2=31 (км/ч)-по течению
28,8-2,2=26,6 (км/ч)-против течения
31×3,2=99,2(км)-проплыл по течению
26,6×2,5=66,5 (км)-проплыл против течения
99,2 +66,5 =165,7 (км)-путь теплохода

Answer 3

Problem Analysis

We are given the following information: - The boat travels downstream for 3.2 hours. - The boat travels upstream for 2.5 hours. - The boat's own speed is 28.8 km/h. - The speed of the current is 2.2 km/h.

We need to find the total distance traveled by the boat.

Downstream Calculation

When the boat is traveling downstream, its effective speed is the sum of its own speed and the speed of the current. We can calculate the distance traveled downstream using the formula:

Distance = Speed x Time

The speed of the boat downstream is 28.8 km/h + 2.2 km/h = 31 km/h.

The time traveled downstream is 3.2 hours.

Using the formula, we can calculate the distance traveled downstream:

Distance downstream = 31 km/h x 3.2 hours = 99.2 km.

Upstream Calculation

When the boat is traveling upstream, its effective speed is the difference between its own speed and the speed of the current. We can calculate the distance traveled upstream using the same formula:

Distance = Speed x Time

The speed of the boat upstream is 28.8 km/h - 2.2 km/h = 26.6 km/h.

The time traveled upstream is 2.5 hours.

Using the formula, we can calculate the distance traveled upstream:

Distance upstream = 26.6 km/h x 2.5 hours = 66.5 km.

Total Distance Traveled

To find the total distance traveled by the boat, we need to add the distance traveled downstream and the distance traveled upstream:

Total distance = Distance downstream + Distance upstream

Total distance = 99.2 km + 66.5 km = 165.7 km.

Therefore, the boat traveled a total distance of 165.7 km.

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