The length of the bridge, which a train 130 metres long and travelling at 45 km/hr can cross in 30 seconds, is:
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Answered by
2
Hey!
Given,
Length of train = 130 m
Speed = 45 km/hr or 25/2 m/s
Time = 30 s
We know,
Let length of bride be L.
so, 130+L/30 = 25/2
=> 2(130+L) = 750
=> L = 245 m
Hence, length of bridge is 245 m
Given,
Length of train = 130 m
Speed = 45 km/hr or 25/2 m/s
Time = 30 s
We know,
Let length of bride be L.
so, 130+L/30 = 25/2
=> 2(130+L) = 750
=> L = 245 m
Hence, length of bridge is 245 m
Anonymous:
Good
thanks
Answered by
2
Heya,
Answer to your question is:-
Speed= 45×5/18
= 25/2 m/sec
Time = 30 sec.
Let the length of bridge be x metres.
Then, (130+x)/30 = 25/2
=> 2(130+x)=25×30
=> 260+2x= 750
=> 2x= 750-260
=> 2x=490
=> 【x= 245m】 ANSWER...
HOPE THIS HELPS YOU:-))
@Ashu
Answer to your question is:-
Speed= 45×5/18
= 25/2 m/sec
Time = 30 sec.
Let the length of bridge be x metres.
Then, (130+x)/30 = 25/2
=> 2(130+x)=25×30
=> 260+2x= 750
=> 2x= 750-260
=> 2x=490
=> 【x= 245m】 ANSWER...
HOPE THIS HELPS YOU:-))
@Ashu
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