Question

Скорость катера по течениюреки25,8км/ч,а против тияения-21,2км/ч.Найдите.1)скость течения реки.2)собственую скоростькатера

Answer 1

1)(25,8-21,2):2=2,3 км/ч скорость течения реки; 2)21,2+2,3=23,5 км/ч собственная скорость катера;

Answer 2

Speed of the River Current

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

Speed of the river current = (Speed of the boat downstream - Speed of the boat upstream) / 2

Given that the speed of the boat downstream is 25.8 km/h and the speed of the boat upstream is 21.2 km/h, we can calculate the speed of the river current as follows:

Speed of the river current = (25.8 km/h - (-21.2 km/h)) / 2

Simplifying the equation, we have:

Speed of the river current = (25.8 km/h + 21.2 km/h) / 2

Calculating the values, we get:

Speed of the river current = 47 km/h / 2 = 23.5 km/h

Therefore, the speed of the river current is 23.5 km/h. [[1]]

Speed of the Boat

To find the speed of the boat, we can use the following formula:

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

Given that the speed of the boat downstream is 25.8 km/h and the speed of the boat upstream is 21.2 km/h, we can calculate the speed of the boat as follows:

Speed of the boat = (25.8 km/h + (-21.2 km/h)) / 2

Simplifying the equation, we have:

Speed of the boat = (25.8 km/h - 21.2 km/h) / 2

Calculating the values, we get:

Speed of the boat = 4.6 km/h / 2 = 2.3 km/h

Therefore, the speed of the boat is 2.3 km/h. [[1]]

Please note that these calculations assume that the speed of the boat remains constant throughout the journey and that the river current is uniform.