Question

Расстояние между двумя пристанями 90 от каждой из них одновременно на встречу друг другу два теплохода сколько часов им понадобится чтобы встретится если скорость первого 20 км /ч , а второго 25км/ ч

Answer 1

Их общая скорость 20+25=45 км/ч
тогда все это расстояние они пройдут за 90 /45=2часа-такое время им понадобится ,чтобы встретиться

Answer 2

Скорость сближения теплоходов: v = v₁+v₂ = 20+25 = 45 (км/ч)

Так как S = vt  =>  t = S/v = 90/45 = 2 (ч)

Ответ: теплоходы встретятся через 2 часа.

Answer 3

Calculating the Time for the Ships to Meet

To calculate the time it will take for the two ships to meet, we can use the formula: time = distance / relative speed.

The relative speed is the sum of the speeds of the two ships, as they are moving towards each other.

Given: - Distance between the two piers: 90 km - Speed of the first ship: 20 km/h - Speed of the second ship: 25 km/h

We can calculate the relative speed and then use it to find the time it will take for the ships to meet.

Calculating Relative Speed

The relative speed of the two ships is the sum of their speeds, as they are moving towards each other.

Relative speed = Speed of first ship + Speed of second ship

Relative speed = 20 km/h + 25 km/h Relative speed = 45 km/h.

Calculating Time

Now, we can use the formula time = distance / relative speed to find the time it will take for the ships to meet.

Time = 90 km / 45 km/h Time = 2 hours.

Therefore, it will take the two ships 2 hours to meet if the first ship is traveling at 20 km/h and the second ship is traveling at 25 km/h.