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Word count: 1Two trains 120 m and 80 m in length are running in opposite direction with velocities 42 km/hand 30 km/hr . In what time they will completely cross each other?Answer:LX 날I​

Answer»

Answer:

60 secs

Explanation:

time to cross COMPLETELY is given by

(SUM of distances) /relative VELOCITY

Relative velocity is 12Km/hr or 3.33m/sec

time hence is

\frac{120 + 80}{ \frac{10}{3} }  = 60



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