Question

Пловец спрыгнул с лодки и поплыл к берегу. Через 3 минуты он проплыл три пятых расстояния до берега. Сколько времени ему осталось плыть , если скорость его движения не изменится?

Answer 1

3/5/3=3/15=1/5   это скорость   его

 

 ему осталось  плыть   2/5 

значит  2/5/1/5  = 2минуты 

Answer 2

Answer in detail. The swimmer jumped off the boat and swam to the shore. After 3 minutes he swam three fifths of the distance to the shore. How much time does he have left to swim, if his speed does not change?

To answer this question, we need to find the total time it takes for the swimmer to swim the whole distance to the shore, and then subtract the time he has already spent. We can use the formula:

$$t = \frac{d}{v}$$

where $t$ is the time, $d$ is the distance, and $v$ is the speed.

We know that the swimmer swam three fifths of the distance in 3 minutes, so we can write:

$$3 = \frac{3d}{5v}$$

Solving for $v$, we get:

$$v = \frac{3d}{15}$$

Plugging this into the formula for $t$, we get:

$$t = \frac{d}{\frac{3d}{15}} = \frac{15}{3} = 5$$

So the total time it takes for the swimmer to swim the whole distance is 5 minutes. Since he has already swam for 3 minutes, he has 5 - 3 = 2 minutes left to swim.