A train crosses a platform and a tunnel in 18 and 32 seconds. The speed of the train and the length of the train are 45 kmph and 140 metres. Find the length of the platform is approximately what percent less than the length of tunnel
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Answer:
Relative Difference : Distance1 - Distance2 = 20 km
Speed1 - Speed2 = 5km/hr
So, Time = Distance/Speed
= 20km/5
Time = 4 hrs.
Now, Distance is equal to Speed x Time.
(30km/hr + 25km/hr)*4
= 55*4
Ans = 220 km.
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