Two trains 126 m & 114 m long are running in opposite directions, one at the rate of 30 kmph & other at the rate of 42 kmph. From the moment they meet, they will cross each other in
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Answer:
total distance=
126+114 m=
240 m
relative velocity=
42+30 km per h
= 72 km per h
20 m per sec
time= distance/speed
= 240/20
= 12 sec
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