Question : A bus travels for three hours at 60 km/hr, four hours at 50 km/hr, and the next five hours at 50 km/hr. Find its average speed.

Option 1: 52.5 km/hr

Option 2: 52 km/hr

Option 3: 46 km/hr

Option 4: 50 km/hr

Question : A boat can move upstream at 25 km/hr and downstream at 35 km/hr. What is the speed of the current?

Option 1: 10 km/hr

Option 2: 15 km/hr

Option 3: 5 km/hr

Option 4: 22.5 km/hr

Question : A ship goes at 18 km/hr downstream and at 16 km/hr upstream. What will be the speed of the ship in still water?

Option 1: 14 km/hr

Option 2: 17 km/hr

Option 3: 16 km/hr

Option 4: 15 km/hr

Question : Two trains, each of length 125 metres, are running in parallel tracks in opposite directions. One train is running at a speed of 65 km/hr and they cross each other in 6 seconds. The speed of the other train is:

Option 1: 75 km/hr

Option 2: 85 km/hr

Option 3: 95 km/hr

Option 4: 105 km/hr

Question : Aman decided to cover a distance of 12 km in 78 minutes. He decided to cover the initial two-thirds of the distance at 10 km/hr and the remaining at some different speed. Find the speed for the last one-third of the distance.

Option 1: 7.8 km/hr

Option 2: 8 km/hr

Option 3: 8.4 km/hr

Option 4: 9 km/hr