hi,
If u r not interested in car race,doesn't mean that there is no role of speed in ur life. Every time u change ur position or go somewhere u covers a distance and for this u take time and so speed comes here. Many situation comes in life e.g.
1) when u want to go a city say from city 'A' to city 'B', don't you want to know by which train u can reach soon.
2)whenever u go from one place to other, ur speed decides time taken by you.
There r many examples . Even when u were posting these questions, had u thought about typing speed?
Your next question is about "rate"
What do u mean? Coz rate is not only concerned with time.
Rate of anythin can be measured with respect to anything.e.g. Rate of change in 'x' w.r.t. 'y'
Now ur last question was about speed
Speed is distance travelled per unit time. Here unit time means 1s,1 hr,1min etc
In SI system it is 1s i.e. Distance covered in one second
V=s/t
If t=1, v=s/1 or v=s i.ea speed=distance travelled in 1s
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If science solves one problem, it creates ten other problems.
