A 120 M long train is moving in a direction with a speed of 20 metre per second. another train that is 130 M long moving with 30 metre per second in the opposite direction cross the first train in?
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Answered by
90
Given that
. TL1= 120m
. Speed of 1st train=20m/s
. TL2=130m
. Speed of 2nd train=30m/s
Relative Velocities of two trains
V(R)=Velocity of 2nd train+Velocity of 1st train
. =30+20
. =50m/s
Hence relative velocities of trains are 50m/s.
Total distance to be covered by trains
=130+120
=250m
We have to find time now then;
Time taken=distance travelled/speed attained
. =250/50
. =5 second
. Hence the two trains will cross each other in 5 seconds.
. TL1= 120m
. Speed of 1st train=20m/s
. TL2=130m
. Speed of 2nd train=30m/s
Relative Velocities of two trains
V(R)=Velocity of 2nd train+Velocity of 1st train
. =30+20
. =50m/s
Hence relative velocities of trains are 50m/s.
Total distance to be covered by trains
=130+120
=250m
We have to find time now then;
Time taken=distance travelled/speed attained
. =250/50
. =5 second
. Hence the two trains will cross each other in 5 seconds.
Answered by
18
Answer:
none of these
Explanation:
because the speed and distance are simultaneously differ by 2 of 10 units
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