In 9 seconds, a 270-meter-long train travelling at 120 kmph crosses another train travelling at 80 kmph in the other direction. What is the other train's length?
A. 230 m
B. 240 m
C. 260 m
D. 720 m
Answer:A
In 9 seconds, a 270-meter-long train travelling at 120 kmph crosses another train travelling at 80 kmph in the other direction. What is the other train's length?
A. 230 m B. 240 m C. 260 m D. 720 m
Explanation: Relative speed equals (120 + 80) km/hr = 200 x 5/18 m/sec = 500/9 m/sec.Let the other train's length be x metres.As a result, x + 270/9 = 500/9 x + 270 = 500 x = 230.