Question

Скорость лодки по течению реки 19 км\ч, а против течения реки 13 км\ч. КАКОВА СКОРОСТЬ ТЕЧЕНИЕ РЕКИ

Answer 1

X - течение реки

19-x=13+x
-x-x=-19+13
-2x=-6
x=-6/-2
x=3

Ответ: скорость течения реки равна 3 км/ч

Answer 2

Пускай х — скорость течения реки, у — скорость лодки. Имеем х+у=19, у-х=13, х+у=19, у=13+х, х+13+х=19, 2х+13=19, 2х=19-13=6, х=3, у=13+3=16

Answer 3

Calculation of River Current Speed

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

River Current Speed = Boat Speed Upstream - Boat Speed Downstream

Given that the boat speed downstream is 19 km/h and the boat speed upstream is 13 km/h, we can substitute these values into the formula:

River Current Speed = 19 km/h - 13 km/h

Simplifying the equation, we get:

River Current Speed = 6 km/h

Therefore, the speed of the river current is 6 km/h.