Two trains

Two trains go at each other. First at speed 40 km/h and the second at speed 60 km/h. At what distance will be 30 minutes before they will meet?

Correct result:

s =  50 km

Solution:

s=(40+60) (30/60)=50 kms=(40+60) \cdot \ (30/60)=50 \ \text{km}



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