Question

two men are running along a railway track at the speed of 8kmph and 4kmph more in the same direction in which a train overtakes first man in 6¼ second and it take 2½ second more to overtake the second man than the first man. find the speed of the train kmph​

Answer 1

Step-by-step explanation:

Let the length of the train be x metres and speed be y m/s

Speed of the first person=2kmph

=2×

18

5

=

9

5

m/s

Speed of the second train =4kmph

=4×

18

5

=

9

10

m/s

y−

9

5

x

=9

9y−5=x

90y−50=10x(1)

y−

9

10

x

=10

90y−100=10 (2)

Substracting 1 and 2

90y−50−90y+100=10x−9x

x=50

So, the length of the train=50m