Question

Two trains are running at 40 km/hr and 20 km/hr respectively in the same direction. Fast train completely passes a man sitting in the slower train in 5 seconds. What is the length of the fast train?
A) 27 7/9 mts
B) 25 8/7 mts
C) 21 1/4 mts
D) 22 mts

Answer 1

Hii dear Here is ur answer



Option b is the right answer


Hope its help u

Answer 2

$\underline{\underline{\Huge\mathfrak{Solution-: }}}$


◆As Trains are moving in same direction, 

●So, Relative Speed = 40-20 = 20 kmph
= 20*(5/18) = 50/9 m/sec

Length of Train= Speed × Time
$\begin{aligned} Length = \frac{50}{9} \times 5 \\ = \frac{250}{9} \\ =27\frac{7}{9} \end{aligned} \:$


★$\bold{Option-:A}$✔️✔️✔️