Time, Distance ...

Two persons start from A and B with the speed of 25 kmph and 49 kmph, respectively towards each other. After they cross each other, the person from B covers 145 km to reach A. What is the distance (in km) between A and B?

A ship went on a voyage. After it had travelled 180 miles, a plane started from the same starting point, as of the ship, with 10 times the speed of the ship. How far from the starting point would they be when they are at the same distance from the starting point?

Brown starts 2 hours after John and overtakes him in 4 hours. If the difference between the speeds of John and Brown is 20 kmph, what is the distance travelled by Brown before meeting John?

A train of length 120 metres overtakes another train of length 100 metres in 8 seconds. If the speed of the slower train is 27 kmph, what is the speed of the faster train?

A boat takes 6 hours to travel from A to B (upstream). The river flows at the rate of 2 kmph. How long will the boat take to travel from B to A (downstream), if the distance from A to B is 36 km?