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A train 105 m long passes a person, running at 2 kmph in the direction opposite to that of the train, in 2 seconds. The speed of the train is:
- A100 kmph
- B123 kmph
- C187 kmph
- D144 kmph
Correct answer: C
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0
CCommunity
187 kmph
NA
NA
0
CCommunity
Solution:
Relative speed of train with respect to the person
= 105m/2s = 52.5 m/s
= 52.5(18/5) Kmph
=189 Kmph
Speed of the person = 2 Kmph
We know that,
Relative speed of train wrt the person
= Speed of the train + Speed of the person
189 = Speed of the train + 2
Speed of the train = (189 - 2)Kmph
Speed of the train = 187 Kmph
So, the correct option is C). 187 Kmph
Relative speed of train with respect to the person
= 105m/2s = 52.5 m/s
= 52.5(18/5) Kmph
=189 Kmph
Speed of the person = 2 Kmph
We know that,
Relative speed of train wrt the person
= Speed of the train + Speed of the person
189 = Speed of the train + 2
Speed of the train = (189 - 2)Kmph
Speed of the train = 187 Kmph
So, the correct option is C). 187 Kmph