

View Answer
In 6 seconds, the man walking at the rate of 6 km/hr, covers 10 metres.
So, train has to move actually (150 − 10) i.e 140 metres in 6 seconds to cross the man.
Hence, the speed of train =
140
/
6
m/sec
Now, converting m/sec into km/hr
140
/
6
x
18
/
5
= 84 km/hr

