Q1:
A train running at a speed of 72km/h croses a tree in 9s.What is the length of the train?
Ans: Speed of the train=72km/h
=72x5/18
=20m/s
Length of the train=20x9=180m
Q2:
A train running at a speed of 54km/h croses a tree in 18s.What is the length of the train?
Ans: Speed of the train=54km/h
=54x5/18
=15m/s
Length of the train=15x18=270m
Q3:
A train running at a speed of 108km/h croses a tree in 6s.What is the length of the train?
Ans: Speed of the train=108km/h
=108x5/18
=30m/s
Length of the train=30x6=180m
Q4:
A train of length 600m is passing a electric post near the track in 6s.What is the speed of the train?
Ans: Speed of the train=600/6
=100m/s
=100x18/5
=360km/h
Q5:
A train of length 400m is passing a tree near the track in 20s.What is the speed of the train?
Ans: Speed of the train=400/20
=20m/s
=20x18/5
=72km/h
Q6:
A train of length 300m is passing a electric post near the track in 9s.What is the speed of the train?
Ans: Speed of the train=300/90
=10/3m/s
=10x18/3x5
=12km/h
Q7:
How long does a train 110 m long running at the speed of 72 km/h take to cross a bridge of 130 m length?
Ans: Total distance traveled by the train for crossing the bridge=110+130 = 240 m
Speed of the train=72 km/h
=72 x 5/18 m/s
=20 m/s
Time taken by the train to cross the bridge = 240/20
= 12 s
Q8:
How long does a train 200 m long running at the speed of 36 km/h take to cross a bridge of 80 m length?
Ans: Total distance traveled by the train for crossing the bridge=200+80 = 280 m
Speed of the train=36 km/h
=36 x 5/18 m/s
=10 m/s
Time taken by the train to cross the bridge=280/10
=28 s
Q9:
How long does a train 140 m long running at the speed of 90 km/h take to cross a platform of 110 m length?
Ans: Total distance traveled by the train for crossing the bridge=140+110 = 250 m
Speed of the train=90 km/h
=90 x 5/18 m/s
=25 m/s
Time taken by the train to cross the bridge=250/25
=10 s
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