Question

ПОМОГИТЕ ПОЖАЛУЙСТА! Скорость теплохода в стоячей воде равна 40,5 км/ч, а скорость течения-2,8 км/ч. Найдите скорость теплохода по течению и против течения ЖЕЛАТЕЛЬНО С РЕШЕНИЕМ

Answer 1

40,5+2,8=43,3км/ч скорость теплохода по течению
40,5-2,8=37,7км/ч скорость теплохода против течения

Answer 2

Calculation of the Speed of the Boat with and against the Current

To find the speed of the boat with and against the current, we need to consider the relative motion between the boat and the water.

Let's denote the speed of the boat in still water as Vb (40.5 km/h) and the speed of the current as Vc (-2.8 km/h). The negative sign indicates that the current is flowing in the opposite direction to the boat's motion.

The speed of the boat with the current (Vbw) can be calculated by adding the speed of the boat in still water to the speed of the current:

Vbw = Vb + Vc

Substituting the given values:

Vbw = 40.5 km/h + (-2.8 km/h)

To find the speed of the boat against the current (Vba), we subtract the speed of the current from the speed of the boat in still water:

Vba = Vb - Vc

Substituting the given values:

Vba = 40.5 km/h - (-2.8 km/h)

Now, let's calculate the values:

Vbw = 40.5 km/h + (-2.8 km/h) = 37.7 km/h

Vba = 40.5 km/h - (-2.8 km/h) = 43.3 km/h

Therefore, the speed of the boat with the current is 37.7 km/h, and the speed of the boat against the current is 43.3 km/h.

Please note that the calculations assume a linear relationship between the boat's speed and the current's speed, which may not be entirely accurate in real-world scenarios.