Calculations based on Problems on trains - Two trains/objects travelling in opposite direction with length

Problems on trains - Two trains/objects travelling in opposite direction with length

We calculate relative speed as sum of  both of the trains/objects speeds i.e if u m/s is the speed of first train/object and v m/s is the speed of second train. Then we calculate, 

Relative speed = (u+v)m/s

The distance between them is considered as sum of their lengths i.e l = l1 + l2

where, l1 = length of first train,

            l2 = length of second train

obtained relative speed and distance is used to calculate time taken for the fastest object to completly cross the other.

Formulae Used 

Time taken = (length of object1 + length of object2) / Relative speed

Calculating time taken by the trains/objects to completely cross the other

Formula : Time = length(train1 + train2) / relative speed

Input

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Check your output in all other similar units

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

Calculating speed of train

Formula : Speed of train1 = (length(train1 + train2)/ time) - speed of train2

Input

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Check your output in all other similar units

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

Calculating length of train

Formula : Length train1 = (time ⨯ relative speed)- length of train2

Input

Reset






Check your output in all other similar units

Length of second/first train(m) {{lmvalue}}
Length of second/first train(km) {{lkmvalue}}
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