Answers

The Brainliest Answer!
2014-05-23T09:31:56+05:30
Let speed of train be x
Let speed of care be y
We know that Distance = Speed * Time
ATQ :-
320/x + (600-320)/y = 8 + 40/60 hours = 8 + 2/3 hours..............................................(1)
200/x + (600-200)/y = 8 + 40/60 + 30/60 = 8 + 2/3 + 1/2...........................................(2)
I have just used the formula Time = Distance/Speed to write speed of train and car individually.
Writing (1) and (2) as linear equations by putting 1/x=a and 1/y=b..............................(3)
320a + 280b = 8 +2/3
200a + 400b = 8 + 2/3 + 1/2
Thus, solving the above equations, we get a = 1/80 and b=1/60
Now, x = 80 and y = 60 ................................................................................using (3)
So, speed of train is 80 kmph and speed of car is 60 kmph.
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