SOLUTION: Two cars(A & B)started to from two stations at the same time. Distance b/w the stations is 230 km. After 3 hours distance b/w them is 20 km. The speed of B increases by 10 km for e

Question 294671: Two cars(A & B)started to from two stations at the same time. Distance b/w the stations is 230 km. After 3 hours distance b/w them is 20 km. The speed of B increases by 10 km for every one hour. What is the ratio of their speeds?
i solved equation and got expression as (speed of A)+(speed of B)=60.If it is true then how to cnvert into ratio?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
Which equation did you solve to get a+b=60?
What is the ratio of their speeds at what time?
B keeps changing.
We aren't told anything about A's speed.
In 3 hours they have gone 210 km
but B goes 10 kph more each hour.
1st hour distance a+b
2nd hour a+b+10
3rd hour a+b+20
So we have 3a+3b+30=210
divide by 3
a+b+10=70
a+b=60
a=60-b
or
b=60-a
But again when are we taking this ratio?
It is different at each hour.
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