A train travels 360km ata uniform speed .If the speed has been 5km/hr more ,it would have taken 1hr less for the same journey .find the speed of thr train
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suggest that the speed of a train is now X km/h
so the train need 360/X hours to travel
.
the train increased its speed to 5kmph more(5+X)
so now the train need 360/X+5 hours to travel
it takes 1 hour less
so
(360/X)-(360/X+5)=1
solving this equation...
X= -45 or 45
but the value of speed is not in minus .
there fore the uniform speed of the train is X so the speed of the train is 45 km/hour.
I hope you understand my solution..
so the train need 360/X hours to travel
.
the train increased its speed to 5kmph more(5+X)
so now the train need 360/X+5 hours to travel
it takes 1 hour less
so
(360/X)-(360/X+5)=1
solving this equation...
X= -45 or 45
but the value of speed is not in minus .
there fore the uniform speed of the train is X so the speed of the train is 45 km/hour.
I hope you understand my solution..
Laxmikant11:
no ur soln is nt perfect
why.. what's my mistake plz tell me
becaz u use many language
ya..
its my mistake..
okkk
Answered by
10
Hey !!
See the linked image.
Hope it helps you :)
See the linked image.
Hope it helps you :)
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there mistake in the equation..n= -40 or 45 plz check it
On solving the equation ,we get n=40 or n=-45 ,But since speed can't be negative , we get speed of train = 40Km/h
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