a train 100m long is moving at a speed of 50 km/h crosses a train 120m long coming from opposite direction on parallel tracks in 6 sec. the speed of the second train is

Question

anonymous · Answer

Would love to help, but this question is lacking a question... :/

ganeshie8 · Answer

any method u familiar wid @master71  ?

ganeshie8 · Answer

@techhelper  i think we need to find the speed of second train

anonymous · Answer

yes

anonymous · Answer

ah, alright. i think he was still going to give more information. :)

ganeshie8 · Answer

say, speed of second train = $x$ km/h

ganeshie8 · Answer

relative speed  =  $50 + x$   km / h

ganeshie8 · Answer

overlapping distance = 100 + 120 = 220

next, use the relation :-
distance = speed x time

ganeshie8 · Answer

can u solve $x$ ?

anonymous · Answer

no

anonymous · Answer

what is the ans

ganeshie8 · Answer

distance = speed x time

$\frac{220}{1000} = (50+x) \times   \frac{6}{60\times 60} $

solve  $x$

ganeshie8 · Answer

if u want answer, feed it to wolfram http://www.wolframalpha.com/input/?i=%5Cfrac%7B220%7D%7B1000%7D+%3D+%2850%2Bx%29+%5Ctimes+++%5Cfrac%7B6%7D%7B60%5Ctimes+60%7D+

anonymous · Answer

ok thanks

ganeshie8 · Answer

np :)

anonymous · Answer

the ratio of the length and breadth of a plot is 3:2 if the bredth ia 40m less than the length , what is the perimeter of the plot