11. If a train 200 m long takes 20s to cross a pole, then how much time does it take to cross a bridge of length 300 m (in seconds)?
(2) 30
(b) 40
(c) 50
(d) 63
Answers
Answered by
1
Answer:
Correct option is
2
30 sec
Length of the train = 150 m
Length of the train = 500 m
∴ Total length =(500+150)m=650m
∴ Speed of the train =
30
650
m/sec=21
3
2
m/sec
Now total length of the train and new bridge =(370+150)m=520m
∴ Time taken =
65
520×3
sec=24sec.
Answered by
2
Answer:
TIME TAKEN TO REACH 200 M =20 SECONDS
TIME TAKEN TO REACH 1 M = 20/200 SECONDS
TIME TAKEN TO REACH 300 M=20/200*300
=30 seconds
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