Question

Two trains ‘L’ and ‘M’ of lengths 720 metres and 480 metres respectively are travelling towards each other. Ratio of speed of ‘L’ to ‘M’ is 5:3. If the trains take 60 seconds to cross each other from the time they meet, then find the average of speeds (in km/h) of trains ‘L’ and ‘M’.

A 18 km/h
B 22 km/h
C 28 km/h
D 36 km/h
E 42 km/h
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