Question

Скорость товарного поезда 1,2 км/мин,а скорость пассажирского поезда,движущегося в том же направлении ,1,5 км/мин. Найдите расстояние между ними в данный момент,если пассажирский поезд до гонит товарный через 21 мин

Answer 1

1,2*60=72 км/ч;    1,5*60=90км/ч. 21мин=21/60=7/20часа. 90-72=18км/ч. S=18*7/20=6.3км.

Answer 2

Скорость сближения =1,5-1,2=0,3км в минза 21 минуту пройдет 0,3*21=6,3км

Answer 3

Calculation of Distance between the Freight and Passenger Trains

To find the distance between the freight and passenger trains, we can use the formula:

Distance = Speed x Time

Given: - Speed of the freight train = 1.2 km/min - Speed of the passenger train = 1.5 km/min - Time taken by the passenger train to catch up to the freight train = 21 min

Let's calculate the distance between the two trains.

Step 1: Calculate the distance covered by the passenger train in 21 minutes: Distance covered by the passenger train = Speed of the passenger train x Time taken by the passenger train Distance covered by the passenger train = 1.5 km/min x 21 min

Step 2: Calculate the distance covered by the freight train in 21 minutes: Distance covered by the freight train = Speed of the freight train x Time taken by the passenger train Distance covered by the freight train = 1.2 km/min x 21 min

Step 3: Calculate the difference in distances covered by the two trains: Difference in distances = Distance covered by the passenger train - Distance covered by the freight train

Step 4: Calculate the distance between the two trains: Distance between the two trains = Difference in distances

Let's calculate the distance using the given values:

Step 1: Calculate the distance covered by the passenger train in 21 minutes: Distance covered by the passenger train = 1.5 km/min x 21 min = 31.5 km

Step 2: Calculate the distance covered by the freight train in 21 minutes: Distance covered by the freight train = 1.2 km/min x 21 min = 25.2 km

Step 3: Calculate the difference in distances covered by the two trains: Difference in distances = 31.5 km - 25.2 km = 6.3 km

Step 4: Calculate the distance between the two trains: Distance between the two trains = 6.3 km

Therefore, the distance between the freight and passenger trains at the given moment is 6.3 km.