(i) You are riding your bike at 10 km/h. 12 minutes later, your speed is 7 km/h.
If you walk at a speed of 20 km/hr from your house, you will reach your school at 9.05 a.m. If you walk at 30 km/hr, then you will reach by 8.55 a.m. Find the distance between your house and school.
If you are walking at constant velocity of 8 km/h and a car passed you by at the speed of 20
km/h from behind, what is the car's velocity from your viewpoint?