Question

A train passes two persons walking in the same direction at a speed of 3 kmph and 5 kmph respectively in 10 seconds and 11 seconds respectively. The speed of the train is
A.28kmph
B.27 kmph
C.25 kmph
D.24 kmph

Answer 1

ĀNSWĒR ⏬⏬

C.25 kmph


✔
Let the speed of the train be S. And length of the train be x.
When a train crosses a man, its travels its own distance.

According to question;
x/[(S-3)*(5/18)] = 10;
or, 18x = 50*S-150; . . . . . . . . (i)
And;
x/[(x-5)*(5/18)] = 11; 
18x = 55*S-275 . . . . . . . . . .. . . (ii)
Equating equation (i) and (ii), we get,
50*S-150 = 55*S-275;
Or, 5*S = 125;
Or, S = 25 kmph.

Answer 2

A train passes two persons walking in the same direction at a speed of 3 kmph and 5 kmph respectively in 10 seconds and 11 seconds respectively. The speed of the train is
A.28kmph
B.27 kmph
C.25 kmph
D.24 kmph


ĀNSWĒR ⏬⏬

C.25 kmph


THANKS ❤


#Nishu HarYanvi ♥