please help me solve. two trains 120m and 80m long are running in opposite directions with velocities 42km/h and 30km/h respectively. in what time will they complwtely cross each other
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relative vel of train of vel 42 km/h w r t the other=42-(-30)=72 km/h as they are running opposite to each other.
the distance it (one withvel 42 km/h )have to cross=120+80=200 km to cross each other
will be=200/72 =2 hr 7/9 min
the distance it (one withvel 42 km/h )have to cross=120+80=200 km to cross each other
will be=200/72 =2 hr 7/9 min
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