Question

Two trains are moving in the same direction at 50 km/hr and 30 km/hr. The faster train crosses a man in the slower train in 18 seconds. Find the length of the faster train.

• A. 120 m
• B. 110 m
• C. 100 m
• D. None of these

Answer 1

The correct option is C 100 m

(c)
Relative speed =(50-30)km/hr=20km/hr

$=(20\times \frac{5}{18})=\left(\frac{50}{9}\right)m/\sec$

Distance covered in 18 esc at this speed

$(18\times \frac{50}{9})m=100m$

therefore Length of faster train=100m.