Question

A 100 m long train is running at a speed of 108 km/hr. How long will it take to cross a
platform 200 m long?
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Answer 1

Answer:

10seconds

Step-by-step explanation:

Given,

• Length of the train,D1 :- 100m
• Length of the platform,D2 :- 200m
• Speed of the train,S :- 108km/hr

To find :-

• t = ?

First convert the speed into m/s :

• S = 108km/hr = 108 x 5/18m/s

Now, we know the speed Formula :-

• S = d/t and distance is D1 + D2

Substitute the given values in the Formula.

• S = d/t
• 108 x 5/18 = 100 + 200/t
• t = 300 x 18/108 x 5
• t = 60 x 18/108
• t = 5 x 18/9
• t = 5 x 2
• t = 10seconds

Hence,time t = 10seconds

Hope it helps