Two trains are running 40km/h and 20 km/h respectively, in the same direction. The fast train completely passes a man sitting in the slow train in 5 s. The length of the fast train is

A) \( \Large 23\frac{2}{9} \) m

B) 27 m

C) \( \Large 27\frac{7}{9} \) m

D) 23 m

Correct answer:
C) \( \Large 27\frac{7}{9} \) m

Description for Correct answer:
The length of the fast train

= Relative speed x Time

= \( \Large \left(40-20\right) \times \frac{5}{18} \times 5 \)

= \( \Large 27\frac{7}{9} m \)

Please provide the error details in above question

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