Two trains are running at 40 km/hr and 20 km/hr respec-tively in the s

1.	Two trains are running at 40 km/hr and 20 km/hr respec-tively in the same direction. Fast train completely passesa man sitting in the slower train in 5 seconds. What is thelength of the fast train?2.A. 27 7/9 nmB. 28 mC. 29D. 30
Answer» Relative speed = (40 - 20) km/hr =20×5/18=50/9 m/sec Length of faster train =50/9×5= 250/9= 27.7777777778 mtr

Two trains are running at 40 km/hr and 20 km/hr respec-tively in the same direction. Fast train completely passesa man sitting in the slower train in 5 seconds. What is thelength of the fast train?2.A. 27 7/9 nmB. 28 mC. 29D. 30

Answer»

Relative speed = (40 - 20) km/hr =20×5/18=50/9 m/sec

Length of faster train =50/9×5= 250/9= 27.7777777778 mtr