What is the formula to calculate the time taken by a train to cross a stationary object?

Time = Length of the Train / Speed of the Train.

Two trains, A and B, are moving in opposite directions with speeds of x km/h and y km/h, respectively. If their lengths are a and b, what is the time taken for them to cross each other?

Time = (a + b) / (x + y).

A train 400 m long crosses a pole in 10 seconds. What is its speed?

Speed = Length / Time = 400 m / 10 s = 40 m/s.

What is the average speed of a train that travels 300 km in 4 hours and returns the same distance in 5 hours?

Average Speed = Total Distance / Total Time = (300 + 300) / (4 + 5) = 600 / 9 = 66.67 km/h.

If two trains are moving in the same direction at speeds x km/h and y km/h respectively, how long will it take for them to cross each other?

Time = (Length of Train A + Length of Train B) / (x - y).

A train leaves station A at 2:00 PM traveling at 90 km/h. Another train leaves station B, 180 km away, at 2:30 PM traveling at 120 km/h. At what time will they meet?

Let t be the time in hours after 2:00 PM when they meet. The first train travels 90t km, while the second travels 120(t - 0.5) km. Setting the distances equal gives: 90t = 120t - 60. Solving gives t = 2 hours. They meet at 4:00 PM.

A train crosses a 500 m long bridge in 25 seconds. If the train's length is 200 m, what is its speed?

Total distance = Length of Train + Length of Bridge = 200 m + 500 m = 700 m. Speed = Distance / Time = 700 m / 25 s = 28 m/s.

How do you calculate the rest time per hour for a train if its average speed without stoppage is x km/h and with stoppage is y km/h?

Rest Time per hour = (x - y) / x.

Two trains A and B with lengths 300 m and 450 m respectively are traveling towards each other at speeds of 60 km/h and 90 km/h. How long will they take to cross each other?

Time = (300 + 450) / (60 + 90) km/h = 750 m / (60 + 90) * (5/18) = 750 / 125 * (5/18) = 3.75 seconds.

What is the formula to find the meeting point of two trains if they leave two stations at different times?

Distance from the first station = (t2 - t1) * (speed of Train A * speed of Train B) / (speed of Train A - speed of Train B).

A train takes 15 seconds to pass a 120 m long platform. If the train's speed is 54 km/h, what is the length of the train?

Speed = 54 km/h = 54 * (5/18) m/s = 15 m/s. Distance = Speed * Time = 15 m/s * 15 s = 225 m. Length of the train = Total distance - Length of platform = 225 m - 120 m = 105 m.

A train takes 10 seconds to cross a pole. If its speed is 36 km/h, what is the length of the train?

Speed = 36 km/h = 10 m/s. Length of the train = Speed * Time = 10 m/s * 10 s = 100 m.

Two trains leave stations 100 km apart at the same time, traveling towards each other at speeds of 45 km/h and 55 km/h. How long will it take for them to meet?

Combined speed = 45 km/h + 55 km/h = 100 km/h. Time to meet = Distance / Speed = 100 km / 100 km/h = 1 hour.

A train 250 m long is traveling at 72 km/h. How long will it take to pass a bridge 150 m long?

Speed = 72 km/h = 20 m/s. Total distance = 250 m + 150 m = 400 m. Time = Distance / Speed = 400 m / 20 m/s = 20 seconds.

A train travels 150 km at a speed of 75 km/h. How much time does it take?

Time = Distance / Speed = 150 km / 75 km/h = 2 hours.