Driver of an ambulance sees a school bus 60km ahead of him.After 30sec the school bus is 90kmbehind.If the speed of the ambulance is 38kmph,then What is the speed of school bus?
As far as the laws of mathematics refer to reality, they are not certain; and as far as they are certain, they do not refer to reality.
Albert Einstein
"The gaming of numbers is called maths.So participate in this wonderful game and explore in it,learn in it and enjoy in it.Then only you can pass in this wonderful game."