Question

а) По течению реки моторная лодка проплыла 48 км за 3 ч, а против течения за 4 ч. Найдите скорость течения реки. ​

Answer 1

Ответ:48:3=16км/ч по теч. реки за 1час

48:4=12

16-12=14

Разница 14и16=2

Разница 14и12=2

Ск реки 2 км/ч

Ск катера 14 км/ч

Проверка:

(14+2)×3=48

(14-2)×4=48

Answer 2

Calculation of River Current Speed

To find the speed of the river current, we can use the formula:

Speed of the boat in still water = (Speed downstream + Speed upstream) / 2

Let's calculate the speed of the river current using the given information:

- The boat traveled 48 km downstream in 3 hours. - The boat traveled 48 km upstream in 4 hours.

Using the formula mentioned above, we can calculate the speed of the river current as follows:

Speed of the boat in still water = (48 km/h + 48 km/h) / 2 = 96 km/h / 2 = 48 km/h

Therefore, the speed of the river current is 48 km/h.