A car is accelerated in such a way that the speed is doubled after every minute. This way the car reaches the speed of 160 km/hr at 12:05 pm. If the car was started at 11:57 am, at what time will the car’s speed be 40 km/hr?

The speed of the car would be 80 km/hr at 12:04 pm. ∴ the speed of the car would be 40 km/hr at 12:03 pm

- A train has to cover a distance of 135 km in 15 hours. If it covers half journey in 3/5
^{th}time, then the speed of covering the remaining distance in the time left has to be: - A cheetah can catch a deer running with a speed of 144 km/h and is 50 meters ahead of it, in 10 seconds. Find the time taken by the cheetah to catch a zebra that is 170 metres ahead of it and is running with a speed which is 70% of that of the deer.
- Harsh and Dev planned to meet each other. Dev starts to travel from point A to B at the speed of 42 kmph at 10:00 AM and Harsh starts from point B to A at the speed of 28 kmph at 12:00 PM. If they meet at 2: 30 PM, find the distance between A and B.
- Average speed of ‘A’ during a 20-hour journey is 32 km/h. If he covered the first 240 km of his journey at a speed of 20 km/h, then find the speed at which ‘A’ travelled during the remaining journey.
- Vicky and Vikram start running simultaneously around a rectangular track of length 1500m from the same point at speeds of 50 km/hr and 40 km/hr. When will they meet for the first time anywhere on the track if they are moving in opposite directions?
- A train covers a certain distance at a speed of 40 km/h and the next same distance with a speed of 70 km/h and the next same distance with a speed of 120 km/h. find the average speed?
- A train travels at an average speed of 75 km per hour without stoppage and with stoppages it covers the same distance at an average speed of 55 km/hr. How many minutes per hour does the train stop?
- A boy goes to school at 7 km/Hr and return at a speed of 6 km/hr. If he takes 13 hrs in all. Find the distance from his village to school?

- P can run 1km in 5 minutes 10 seconds and Q in 5 minutes 20 seconds. How many meters start can P give Q in a kilometer race so that the they both reach on time?
- A car completes a journey in 6 hrs with a speed of 50 km/hr. At what speed must it travel to complete the journey in 5 hrs?

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