Two trains of equal length are running on parallel lines in the same direction at 45 km/h and 35 km/h. The faster train passes the slower train in 27 s. The length of each train is:

A train 100 m long completely passes a man walking in the same direction at 2 km/h in 9 s and a car travelling in opposite direction in 3 s. At what speed was the car travelling?

A good train left A for B at 3 pm at an average speed of 60 km/h. At 6 pm, an express train also had left A for B a parallel track at an average speed of 90 km/h. how far from A, is the express train expected to overtake the goods train?

Let X be the time taken for the express train to overtake the goods train.

Then, 30= 180/x

X = (180/30) h = 6 h

Distance from A =(90X60) km =540 km

8.

The respective ratio between the speeds of a car, a jeep and a tractor is 3:5:2. The speed of the jeep is 250% the speed of the tractor which covers 360 km in 12 h. what is the average speed of car and jeep together?

Two men starting from the sample place walk at the rate of 5 km/h and 5.6 km/h, respectively. what time will they take to be 3 km apart, if they walk in the same directions?