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1. A train takes 18 sec to pass completely through a station 162m long and 15 seconds through another station 120m long.The length of the train-
- A. 70m
- B. 70m
- C. 70m
- D. 70m
Answer: Option C
Explanation:
Train length + 162m pass in 18 seconds
Train length + 120m pass in 15 seconds
( - ) So, 42 m passes in 3 seconds
In 3 seconds it passes 42 m
In 1 seconds it passes = 42/3 m = 14m
Now, in 15 seconds it passes = ( 14×15) m = 210m
Train length + 120m = 210m
Train length = ( 210 - 120)m = 90m.
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