Question

Зі станції вийшов електропоїзд зі швидкістю 60км/год. Через 3 години з тієї самої станції в тому самому напрямі вийшов другий електропоїзд. З якою швидкістю мав їхати другий електропоїзд, щоб наздогнати перший за 6 год? *

Answer 1

Ответ:

90 км/ч должна быть скорость 2го поезда

Пошаговое объяснение:

1) 60*3=180 км проехал 1й поезд

2) 180:6=30 км/час скорость сближения

3) 30+60=90 км/ч должна быть скорость 2го поезда

Answer 2

Problem Analysis

We are given that an electric train left a station with a speed of 60 km/h. After 3 hours, another electric train left the same station in the same direction. We need to find the speed at which the second train should travel to catch up with the first train in 6 hours.

Solution

Let's assume that the speed of the second train is x km/h.

The first train has been traveling for 3 hours at a speed of 60 km/h, so it has covered a distance of 60 km/h * 3 h = 180 km.

To catch up with the first train in 6 hours, the second train needs to cover the same distance of 180 km.

We can use the formula distance = speed * time to find the speed of the second train.

The distance covered by the second train is 180 km, and the time taken is 6 hours. Therefore, we have:

180 km = x km/h * 6 h

Simplifying the equation, we get:

x km/h = 180 km / 6 h

Solving for x, we find:

x = 30 km/h

Therefore, the second train should travel at a speed of 30 km/h to catch up with the first train in 6 hours.

Answer

The second electric train should travel at a speed of 30 km/h in order to catch up with the first train in 6 hours.