A car did a journey in "t" hours. If the average speed had been "m" km/hr greater, the journey would have taken "y" hours less. What was the length of the journey?
Answer:
Let the length of the journey be x.
therefore speed of the journey = x/t
Also given x = [(x/t)+ m](t - y)
or, xt = (x + tm) (t - y)
or, xt = xt - xy + t2m - tmy
or, xy = tm( t - y)
or, x = tm(t - y)/ y
Answer:
Let the length of the journey be x.
therefore speed of the journey = x/t
Also given x = [(x/t)+ m](t - y)
or, xt = (x + tm) (t - y)
or, xt = xt - xy + t2m - tmy
or, xy = tm( t - y)
or, x = tm(t - y)/ y
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