A car start with a velocity 20 km/hr and after every hour its speed increases by 10 km/hr. After 8 hour it starts decreasing the speed 10 km/hr after every hour and finally it stops in the destination. What is the total length of the journey?

The speed of a car is 63 km/hr, if we don't let it stop at any point. If the car stops at stops, the speed of the car is 54 km/hr. What is the time in minutes that the car stops for per hour?

The speed of a van increases by 5 kmph after every one hour. If the distance travelled in the first one hour was 55 km, what was the total distance travelled in 8 hours?