Question 927373
A train traveling at a speed of 30 mph passes point A on its way to point B. At the same time, on a parallel track, another train traveling at a speed of 70 mph passes point B on its way to point A. If point A and point B are 300 miles apart, how far from point B will the trains meet? 
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Trains are effectively approaching each other at a speed=70+30=100 mph
At 100 mph, they will meet in 300/100=3 hrs
At 70 mph,the train on the way to point A will be 3*70=210 mi from point B
ans (G)