Calculations based on Problems on trains - Two trains/objects travelling in same direction

Problem on trains - Two trains/objects travelling in same direction

When two trains or objects travel in same direction, their speed tends to cancel out each other hence we consider relative speed as the difference between their speeds .

Suppose two trains or two bodies are moving in the same direction at u m/s and v m/s , where u > v, then relative speed = (u-v) m/s 

Formulae Used 

Time taken = length of train /relative speed

Calculating time taken by the train to completely cross an object

Formula : Time = train length / relative speed

Input

Reset




Check your output in all other similar units

Time(sec) {{tsvalue}}
Time(hr) {{thvalue}}

Calculating speed of the train traveling in same direction as object

Formula : Speed of train = (train length / time) + Speed of object

Input

Reset




Check your output in all other similar units

Speed of train(m/sec) {{ssvalue}}
Speed of train(km/hr) {{shvalue}}

Calculating length of train crossing a object

Formula : Length = time ⨯ relative speed

Input

Reset




Check your output in all other similar units

Length(m) {{lmvalue}}
Length(hr) {{lkmvalue}}

Calculating speed of the object traveling in same direction an train

Formula : Speed = Speed of train - (train length / time)

Input

Reset




Check your output in all other similar units

Speed of object(m/sec) {{ssvalue}}
Speed of object(km/hr) {{shvalue}}
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