A train `112 km` in 1 hrs 30 mins with a certain speed how many kilometre it will travel in 4hrs 45 min with sam speed

A train leaves from a station and moves at 40 km/hr. After 2 hours, another train leaves from the same station and moves in the same direction at a certain speed. If the second train catches up with the first train in 4 hours, what is the speed of the second train? Options are (a) 55 km/hr (b) 50 km/hr (c) 60 km/hr (d) 65 km/hr .

How many seconds will a 500 metre long train take to cross a man walking with a speed of 3km/hr. in the direaction of the moving train if the speed of the train is 63km/hr ?

A cyclist moves with a speed of 30km/hr in the first 10 minutes, with speed of 15km/hr in the next 20 minute and with a speed of 40km/hr in the last 15 minutes Calculate the average speed of the cyclist.